A store of Italian designer Valentino is seen in the mountain resort of St. Moritz, Switzerland March 15, 2016. REUTERS/Arnd Wiegmann

A model presents a creation by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

A model presents a creation by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

A model presents a creation by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

A model presents a creation by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

A model presents a creation by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

A model presents a creation by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

A model presents a creation by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

A model presents a creation by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

A model presents a creation by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

A model presents a creation by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli appear at the end of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli appear at the end of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Models present creations by Italian designers Maria Grazia Chiuri and Pier Paolo Piccioli as part of their Fall/Winter 2016/2017 women's ready-to-wear collection for fashion house Valentino in Paris, France, March 8, 2016. REUTERS/Gonzalo Fuentes 

Actress Diane Kruger poses in a Valentino gown as she arrives for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Actress Diane Kruger poses in a Valentino gown as she arrives for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Actress Diane Kruger poses as she arrives for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino creative directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Women wearing Valentino gowns greet each other as they arrive for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Actor Bruce Willis and his wife Emma Heming pose as they arrive for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

From left to right, Valentino CEO Stefano Sassi, Hearst Corporation CEO Steven R. Swartz, Harpers Bazaar Editor and Chief Glenda Bailey, Honorees and Valentino Creative Directors Pierpaolo Piccioli and Maria Grazia Chiuri, and Lincoln Center President Jed Bernstein pose together as they arrive for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. REUTERS/Mike Segar 

Actress Keira Knightley poses as she arrives for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Ivanka Trump poses as she arrives for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino creative directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Ivanka Trump poses as she arrives for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino creative directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Hearst Corporation CEO Steven R. Swartz arrives for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino creative directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Actress and socialite Olivia Palermo (R) poses with Harpers Bazaar Editor and Chief Glenda Bailey and Giancarlo Giammetti, the honorary president of the Valentino Fashion House as they arrive for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. At far left are Nicky Hilton (L) and Kathy Hilton. REUTERS/Mike Segar 

Actress and socialite Olivia Palermo poses in a Valentino gown as she arrives for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. At left are Harpers Bazaar Editor and Chief Glenda Bailey and Giancarlo Giammetti, the honorary president of the Valentino Fashion House. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Actress Liv Tyler poses as she arrives for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Actress Liv Tyler poses as she arrives for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Designer Tommy Hilfiger poses as he arrives for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Actor Bruce Willis and his wife Emma Heming pose as they arrive for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Actor Bruce Willis and his wife Emma Heming pose as they arrive for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

A woman wearing a Valentino gown holds her handbag as she arrives for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Uniformed attendants hold coat hangers to check coats for guests arriving for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Actors Mark Ruffalo and his wife Sunrise Coigney pose as they arrive for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Actors Mark Ruffalo and his wife Sunrise Coigney pose as they arrive for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Actors Mark Ruffalo gestures next to his wife Sunrise Coigney as they arrive for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

A gown from Valentino's Mirabilia Romae Fall 2015 Haute Couture collection is displayed in a lobby at the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

An installation of gowns from Valentino's Mirabilia Romae Fall 2015 Haute Couture collection are seen in a lobby at the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Actress Keira Knightley (C) poses with Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli as they arrive for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Grazia Chiuri and Piccioli. REUTERS/Mike Segar 

Actress Keira Knightley poses as she arrives for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Actress Keira Knightley poses as she arrives for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

Actress Keira Knightley poses as she arrives for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

British actress Keira Knightley greets people as she arrives for the "An Evening Honoring Valentino" gala benefiting the Lincoln Center Corporate Fund at Alice Tully Hall at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. The event honored Valentino Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. REUTERS/Mike Segar 

People stand next to the Revson Fountain and a Christmas tree in the background in Josie Robertson Plaza at Lincoln Center in the Manhattan borough of New York City, December 7, 2015. REUTERS/Mike Segar