Singer Zendaya arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Selena Gomez arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Selena Gomez arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Recording artist Z LaLa arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Carrie Underwood arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Selena Gomez arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Zendaya blows a kiss as she arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Frankie Grande arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Giuliana Rancic arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Ciara arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Model Gigi Hadid arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Gwen Stefani arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Christina Milian arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Justin Bieber arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Actress Julianne Hough arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Television personality Kylie Jenner arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Ciara arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Ciara arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Ciara arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Model Gigi Hadid arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Actor Terry Crews and his wife, Rebecca King-Crews, arrive at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Gwen Stefani arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Gwen Stefani arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Florida Georgia Line duo Brian Kelley (2nd L) with his wife, Brittany Marie Cole and Tyler Hubbard with his wife, Hayley Stommel, arrive at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Model Hannah Davis arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Model Hannah Davis arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Christina Milian arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Actress Hailee Steinfeld arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Actress Julianne Hough arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Recording artist Ellie Goulding arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Model Kendall Jenner arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Model Kendall Jenner (L) and Kylie Jenner arrive at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Television personality Kendall Jenner poses as she arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Recording artists Cole Whittle, JinJoo Lee, Joe Jonas and Jack Lawless of the music group DNCE arrive at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Paula Abdul arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Ariana Grande poses backstage with her award for Favorite Female Artist Pop/Rock during the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Paula Abdul poses backstage at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Musician Tove Lo arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





DJ Diplo (L) and Skillrex pose backstage with their Collaboration of the Year award for "Where Are U Now" with Justin Bieber (not pictured) during the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Actress Rebel Wilson arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Carrie Underwood poses backstage during the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Carrie Underwood poses backstage with her award for Favorite Country Female Artist during the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Demi Lovato arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Singer Demi Lovato arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Model Kendall Jenner arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Show host Jennifer Lopez poses backstage during the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Show host Jennifer Lopez poses backstage during the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Fall Out Boy pose backstage with their award for Favorite Alternative Rock Artist during the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Rapper Wiz Khalifa arrives at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Actors Jenny McCarthy and Donnie Wahlberg arrive at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Actors Jenny McCarthy and Donnie Wahlberg arrive at the 2015 American Music Awards in Los Angeles, California November 22, 2015. (Photo by David McNew/Reuters)





Hailee Steinfeld arrives at the American Music Awards at the Microsoft Theater on Sunday, November 22, 2015, in Los Angeles. (Photo by Jordan Strauss/Invision/AP Photo)





Jenny McCarthy arrives at the American Music Awards at the Microsoft Theater on Sunday, Nov. 22, 2015, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)





Cameron Dallas, left, and Sierra Dallas arrive at the American Music Awards at the Microsoft Theater on Sunday, November 22, 2015, in Los Angeles. (Photo by Jordan Strauss/Invision/AP Photo)





Gwen Stefani arrives at the American Music Awards at the Microsoft Theater on Sunday, November 22, 2015, in Los Angeles. (Photo by Jordan Strauss/Invision/AP Photo)





Ariana Grande poses in the press room with the award for favorite female artist - pop/rock at the American Music Awards at the Microsoft Theater on Sunday, November 22, 2015, in Los Angeles. (Photo by Jordan Strauss/Invision/AP Photo)