Special fashion ambassador for Milan's Expo 2015 Italian designer Giorgio Armani poses during a photo call before his fashion show to celebrate the 40th anniversary of his career and to mark the opening of the Expo 2015 in Milan, April 30, 2015. The Milan Expo will open in the city on May 1, following the 2010 Shanghai Expo. Officials are counting on some 20 million visitors to the six month-long exhibition of products and technologies from around the world. REUTERS/Alessandro Garofalo

Australian actress Cate Blanchett pose before Giorgio Armani's fashion show to celebrate the 40th anniversary of his career and to mark the opening of the Expo 2015 in Milan, April 30, 2015. The Milan Expo will open in the city on May 1, following the 2010 Shanghai Expo. Officials are counting on some 20 million visitors to the six month-long exhibition of products and technologies from around the world. REUTERS/Alessandro Garofalo

Italian actress Sophia Loren pose before Giorgio Armani's fashion show to celebrate the 40th anniversary of his career and to mark the opening of the Expo 2015 in Milan, April 30, 2015. The Milan Expo will open in the city on May 1, following the 2010 Shanghai Expo. Officials are counting on some 20 million visitors to the six month-long exhibition of products and technologies from around the world. REUTERS/Alessandro Garofalo

U.S. actress Hilary Swank poses before the Giorgio Armani's fashion show to celebrate the 40th anniversary of his career and to mark the opening of the Expo 2015 in Milan, April 30, 2015. The Milan Expo will open in the city on May 1, following the 2010 Shanghai Expo. Officials are counting on some 20 million visitors to the six month-long exhibition of products and technologies from around the world. REUTERS/Alessandro Garofalo

U.S. actor Leonardo Di Caprio pose before Giorgio Armani's fashion show to celebrate the 40th anniversary of his career and to mark the opening of the Expo 2015 in Milan, April 30, 2015. The Milan Expo will open in the city on May 1, following the 2010 Shanghai Expo. Officials are counting on some 20 million visitors to the six month-long exhibition of products and technologies from around the world. REUTERS/Alessandro Garofalo

U.S. actor Pierce Brosnan poses before Giorgio Armani's fashion show to celebrate the 40th anniversary of his career and to mark the opening of the Expo 2015 in Milan, April 30, 2015. The Milan Expo will open in the city on May 1, following the 2010 Shanghai Expo. Officials are counting on some 20 million visitors to the six month-long exhibition of products and technologies from around the world. REUTERS/Alessandro Garofalo

Italian designer Roberta Armani, niece of Giorgio, poses before Giorgio Armani's fashion show to celebrate the 40th anniversary of his career and to mark the opening of the Expo 2015 in Milan, April 30, 2015. The Milan Expo will open in the city on May 1, following the 2010 Shanghai Expo. Officials are counting on some 20 million visitors to the six month-long exhibition of products and technologies from around the world. REUTERS/Alessandro Garofalo

Italian director Paolo Sorrentino and his wife Daniela poses before the Giorgio Armani's fashion show to celebrate the 40th anniversary of Armani's career and to mark the opening of the Expo 2015 in Milan, April 30, 2015. The Milan Expo will open in the city on May 1, following the 2010 Shanghai Expo. Officials are counting on some 20 million visitors to the six month-long exhibition of products and technologies from around the world. REUTERS/Alessandro Garofalo

Tina Turner poses with Italian designer Roberta Armani before Giorgio Armani's fashion show to celebrate the 40th anniversary of his career and to mark the opening of the Expo 2015 in Milan, Italy, April 30, 2015. REUTERS/Alessandro Garofalo REFILE - REMOVING REFERENCE TO TINA TURNER'S NATIONALITY 

U.S. actor Chris Pine pose before the Giorgio Armani's fashion show to celebrate the 40th anniversary of Armani's career and to mark the opening of the Expo 2015 in Milan, April 30, 2015. The Milan Expo will open in the city on May 1, following the 2010 Shanghai Expo. Officials are counting on some 20 million visitors to the six month-long exhibition of products and technologies from around the world. REUTERS/Alessandro Garofalo

Pirelli's Chairman and Chief Executive Officer Marco Tronchetti Provare pose with his wife Afef before Giorgio Armani's fashion show to celebrate the 40th anniversary of Armani's career and to mark the opening of the Expo 2015 in Milan, April 30, 2015. The Milan Expo will open in the city on May 1, following the 2010 Shanghai Expo. Officials are counting on some 20 million visitors to the six month-long exhibition of products and technologies from around the world. REUTERS/Alessandro Garofalo

Italian actress Maria Grazia Cucinotta poses before Giorgio Armani's fashion show to celebrate the 40th anniversary of his career and to mark the opening of the Expo 2015 in Milan, April 30, 2015. The Milan Expo will open in the city on May 1, following the 2010 Shanghai Expo. Officials are counting on some 20 million visitors to the six month-long exhibition of products and technologies from around the world. REUTERS/Alessandro Garofalo

U.S. actress Lauren Hutton pose before Giorgio Armani's fashion show to celebrate the 40th anniversary of his career and to mark the opening of the Expo 2015 in Milan, April 30, 2015. The Milan Expo will open in the city on May 1, following the 2010 Shanghai Expo. Officials are counting on some 20 million visitors to the six month-long exhibition of products and technologies from around the world. REUTERS/Alessandro Garofalo

U.S. actress Glenn Close pose before Giorgio Armani's fashion show to celebrate the 40th anniversary of his career and to mark the opening of the Expo 2015 in Milan, April 30, 2015. The Milan Expo will open in the city on May 1, following the 2010 Shanghai Expo. Officials are counting on some 20 million visitors to the six month-long exhibition of products and technologies from around the world. REUTERS/Alessandro Garofalo

Tina Turner poses with her husband Erwin Bach before Giorgio Armani's fashion show to celebrate 40th anniversary of his career and to mark the opening of the Expo 2015 in Milan, Italy, April 30, 2015. REUTERS/Alessandro Garofalo REFILE - REMOVING REFERENCE TO TINA TURNER'S NATIONALITY 

Indian actress Aishwarya Rai pose before Giorgio Armani's fashion show to celebrate the 40th anniversary of his career and to mark the opening of the Expo 2015 in Milan, April 30, 2015. The Milan Expo will open in the city on May 1, following the 2010 Shanghai Expo. Officials are counting on some 20 million visitors to the six month-long exhibition of products and technologies from around the world. REUTERS/Alessandro Garofalo