Miley Cyrus poses backstage after hosting the 2015 MTV Video Music Awards in Los Angeles, California, August 30, 2015. REUTERS/Danny Moloshok 

Singer and show host Miley Cyrus poses as she arrives at the 2015 MTV Video Music Awards in Los Angeles, California, August 30, 2015. REUTERS/Danny Moloshok 

Miley Cyrus performs "Do It" at the 2015 MTV Video Music Awards in Los Angeles, California, August 30, 2015. REUTERS/Mario Anzuoni 

Show host Miley Cyrus speaks on stage at the 2015 MTV Video Music Awards in Los Angeles, California August 30, 2015. REUTERS/Mario Anzuoni 

Miley Cyrus poses backstage after hosting the 2015 MTV Video Music Awards in Los Angeles, California, August 30, 2015. REUTERS/Danny Moloshok 

Singer and show host Miley Cyrus poses as she arrives at the 2015 MTV Video Music Awards in Los Angeles, California, August 30, 2015. REUTERS/Danny Moloshok 

Singer and show host Miley Cyrus poses as she arrives at the 2015 MTV Video Music Awards in Los Angeles, California, August 30, 2015. REUTERS/Danny Moloshok 

Show host Miley Cyrus speaks on stage at the 2015 MTV Video Music Awards in Los Angeles, California August 30, 2015. REUTERS/Mario Anzuoni 

Show host Miley Cyrus speaks on stage at the 2015 MTV Video Music Awards in Los Angeles, California August 30, 2015. REUTERS/Mario Anzuoni 

Show host Miley Cyrus speaks on stage at the 2015 MTV Video Music Awards in Los Angeles, California August 30, 2015. REUTERS/Mario Anzuoni 

Combination picture shows a variety of outfits worn by show host Miley Cyrus at the 2015 MTV Video Music Awards in Los Angeles, California August 30, 2015. REUTERS/Mario Anzuoni/Danny Moloshok TPX IMAGES OF THE DAY

Singer Miley Cyrus poses at the amfAR's Fifth Annual Inspiration Gala in Los Angeles, California October 29, 2014. REUTERS/Mario Anzuoni (UNITED STATES - Tags: ENTERTAINMENT) 

U.S. actress Zoe Kravitz (R) and U.S. singer Miley Cyrus arrive for the Metropolitan Museum of Art Costume Institute Gala 2015 celebrating the opening of "China: Through the Looking Glass," in Manhattan, New York May 4, 2015. REUTERS/Andrew Kelly TPX IMAGES OF THE DAY

U.S. singer singer Miley Cyrus arrives on the red carpet for the Bambi 2013 media awards ceremony in Berlin November 14, 2013. The annual Bambi awards honours celebrities from the world of entertainment, literature, sports and politics. REUTERS/Tobias Schwarz (GERMANY - Tags: ENTERTAINMENT TPX IMAGES OF THE DAY)

U.S. singer Miley Cyrus performs at the O2 Arena in central London May 6, 2014. REUTERS/Olivia Harris (BRITAIN - Tags: ENTERTAINMENT TPX IMAGES OF THE DAY) 

Singer Miley Cyrus poses with fans before her show on NBC's 'Today' show in New York, October 7, 2013. REUTERS/Carlo Allegri (UNITED STATES - Tags: ENTERTAINMENT PROFILE TPX IMAGES OF THE DAY) 

Miley Cyrus performs during the iHeartRadio Music Festival in Las Vegas, Nevada September 21, 2013. REUTERS/Steve Marcus (UNITED STATES - Tags: ENTERTAINMENT TPX IMAGES OF THE DAY) 

Singer Miley Cyrus poses as she arrives for the 2013 MTV Video Music Awards in New York August 25, 2013. REUTERS/Carlo Allegri (UNITED STATES - Tags: ENTERTAINMENT) (MTV-ARRIVALS) 

Singer Miley Cyrus performs "We Can't Stop" during the 2013 MTV Video Music Awards in New York August 25, 2013. REUTERS/Eric Thayer (UNITED STATES - Tags: ENTERTAINMENT) (MTV-SHOW) 

Miley Cyrus and Robin Thicke perform "Blurred Lines" during the 2013 MTV Video Music Awards in New York August 25, 2013. REUTERS/Lucas Jackson (UNITED STATES - Tags: ENTERTAINMENT TPX IMAGES OF THE DAY) (MTV-SHOW) FOR BEST QUALITY IMAGE ALSO SEE: GF2E9AG0AYF01 

Singer Miley Cyrus dances in front of fans as she accepts the Choice Summer Song Award at the Teen Choice Awards at the Gibson amphitheatre in Universal City, California August 11, 2013. REUTERS/Mario Anzuoni (UNITED STATES - Tags: ENTERTAINMENT TPX IMAGES OF THE DAY) 

Singer Miley Ray Cyrus arrives at the Billboard Music Awards in Las Vegas, Nevada May 19, 2013. REUTERS/Steve Marcus (UNITED STATES) 

Singer and actress Miley Cyrus arrives at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of "PUNK: Chaos to Couture" in New York, May 6, 2013. REUTERS/Carlo Allegri (UNITED STATES - Tags: ENTERTAINMENT FASHION)

Singer and actress Miley Cyrus arrives at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of "PUNK: Chaos to Couture" in New York, May 6, 2013. REUTERS/Lucas Jackson (UNITED STATES - Tags: ENTERTAINMENT FASHION)

Miley Cyrus performs Billy Idol's "Rebel Yell" during the VH1 Divas 2012 show in Los Angeles, December 16, 2012. REUTERS/Danny Moloshok (UNITED STATES - Tags: ENTERTAINMENT) 

Singer Miley Cyrus arrives at the VH1 Divas 2012 show in Los Angeles, December 16, 2012. REUTERS/Danny Moloshok (UNITED STATES - Tags: ENTERTAINMENT) 

Miley Cyrus is positioned by her publicist at the 81st Academy Awards in Hollywood, California February 22, 2009. Cyrus is wearing a sequinned Zuhair Murad couture gown.REUTERS/Jason Reed (UNITED STATES) (OSCARS-ARRIVALS)