Members of Fifth Harmony, from left, Normani Kordei, Lauren Jauregui, Dinah Jane Hansen, Ally Brooke, and Camila Cabello arrive at the American Music Awards at the Nokia Theatre L.A.
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Katy Perry arrives at the American Music Awards.
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Ke$ha arrives at the American Music Awards.
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Jennifer Hudson arrives at the American Music Awards.
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Billy Ray Cyrus, left, and his daughter Miley Cyrus arrive at the American Music Awards.
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Kelly Osbourne arrives at the American Music Awards.
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Lady Gaga arrives at the 2013 American Music Awards.
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Ariana Grande poses backstage with the award for new artist of the year.
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From right, T-Boz and Chilli of the musical group TLC pose with Lil Mama, left, backstage at the American Music Awards.
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Ke$ha, center left, and Pitbull, center right, perform on stage at the American Music Awards.
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Ke$ha, center, performs at the American Music Awards.
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Katy Perry performs on stage at the American Music Awards.
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Dan Reynolds of the musical group Imagine Dragons performs on stage at the American Music Awards.
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Tyler Hubbard, left, of the musical group Florida Georgia Line performs on stage with Nelly at the American Music Awards.
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From left, Zayn Malik, Liam Payne, Harry Styles, Louis Tomlinson, and Niall Horan of the musical group One Direction perform on stage at the American Music Awards.
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Marc Anthony accepts the award for favorite artist - Latin at the American Music Awards.
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Bill Maher, left, and Rihanna's mother Monica Braithwaite, right, present the Icon award to Rihanna on stage at the American Music Awards.
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Miley Cyrus performs at the American Music Awards.
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Rihanna poses backstage with the Icon award at the American Music Awards.
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Avicii accepts the award for favorite artist -- electronic dance music at the American Music Awards.
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Ian Axel, left, of A Great Big World performs on stage with Christina Aguilera.
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Justin Timberlake poses backstage with his awards for favorite male artist - pop/rock, favorite male artist - soul/R&B, and favorite album - soul/R&B for "The 20/20 Experience" at the American Music Awards.
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Taylor Swift accepts the award for favorite album -- country for "Red" at the American Music Awards.
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Luke Bryan poses backstage with the award for favorite male artist - country.
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Host Pitbull presents the award for artist of the year.
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Taylor Swift accepts the award for artist of the year.
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Justin Timberlake, center, performs on stage at the Nokia Theater in L.A.
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Lady Gaga, foreground, and R.Kelly perform at the American Music Awards.
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Taylor Swift poses backstage with the awards for favorite album - country for "Red", favorite female artist - pop/rock, favorite female artist - country, and artist of the year at the American Music Awards.
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Jennifer Lopez performs at the American Music Awards.
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