MC Hammer, PSY
MC Hammer, left, and PSY appear on stage at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)
Carly Rae Jepsen
Carly Rae Jepsen performs at the 40th Annual American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)
Joanna Krupa
IMAGE DISTRIBUTED FOR NOKIA - Joanna Krupa arrives at the Rolling Stone American Music Awards After Party, on Sunday, Nov. 18, 2012 in Los Angeles. (Photo by Casey Rodgers/Invision for Nokia/AP Images)
Justin Bieber, Pattie Mallette
Justin Bieber, right, kisses his mother Pattie Mallette as they arrive at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)
Gavin DeGraw, Derek Hough
IMAGE DISTRIBUTED FOR NOKIA - Gavin DeGraw, left, and Derek Hough arrive at the Rolling Stone American Music Awards After Party, on Sunday, Nov. 18, 2012 in Los Angeles. (Photo by Casey Rodgers/Invision for Nokia/AP Images)
Christina Aguilera
Christina Aguilera performs at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)
Carrie Underwood
Carrie Underwood performs “Two Black Cadillacs” at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)
Pink
Pink performs “Try” at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)
Christina Aguilera
Christina Aguilera performs at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)
PSY
PSY performs “Gangnam Style” at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)
Chris Brown
Chris Brown performs “Everyday Birthday” at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)
Justin Bieber, Nicki Minaj
Justin Bieber, right, and Nicki Minaj perform at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)
Ke$ha
Ke$ha performs “Die Young” at the 40th Annual American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)
Usher
Usher performs at the 40th Annual American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)
Gwen Stefani
Gwen Stefani and No Doubt perform “Looking Hot” at the 40th Annual American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)
Kerry Washington
Kerry Washington arrives at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)
Taylor Swift
Taylor Swift performs “I Knew Your Were Trouble” at the 40th Annual American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)
MC Hammer
MC Hammer performs during “Gangnam Style” at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)
will.i.am
will.i.am presents the award for artist of the year to Justin Bieber at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)
Ludacris
Ludacris perform “Everyday Birthday” at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)
Stevie Wonder
Stevie Wonder and the Rickey Minor Band perform “Master Blaster”, “My Cherie Amour” and “Sir Duke” as a tribute to Dick Clark at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)
Swizz Beatz, Ludacris
Swizz Beatz, right, and Ludacris perform “Everyday Birthday” at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)
Stevie Wonder
Stevie Wonder and the Rickey Minor Band perform “Master Blaster”, “My Cherie Amour” and “Sir Duke” during a tribute to Dick Clark at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)
Chris Brown
Chris Brown performs “Everyday Birthday” at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)
Swizz Beatz
Swizz Beatz performs “Everyday Birthday” at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)
Brandy
Brandy introduces Swizz Beatz, Chris Brown and Ludacris at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by John Shearer/Invision/AP)
Carrie Underwood
Carrie Underwood performs “Two Black Cadillacs” at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)
Brandy
Brandy poses backstage at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Jordan Strauss/Invision/AP)
Taylor Swift
Taylor Swift performs “I Knew Your Were Trouble” at the 40th Anniversary American Music Awards on Sunday, Nov. 18, 2012, in Los Angeles. (Photo by Matt Sayles/Invision/AP)
Posted: 11/19/2012 1:49 pm EST Updated: 11/19/2012 1:49 pm EST