40th Annual American Music Awards (80 images)

Ke$ha performs onstage at the 40th Annual American Music Awards held at Nokia Theatre L.A. Live in Los Angeles on November 18, 2012. UPI/Phil McCarten

Ke$ha performs onstage at the 40th Annual American Music Awards held at Nokia Theatre L.A. Live in Los Angeles on November 18, 2012. UPI/Phil McCarten

Justin Bieber and Nicki Minaj perform onstage at the 40th Annual American Music Awards in Los Angeles on November 18, 2012. UPI/Phil McCarten

Justin Bieber accepts the award for Favorite Pop/Rock Male Artist from Jenny McCarthy at the 40th anniversary American Music Awards held at the Nokia Theatre in Los Angeles on November 18, 2012. UPI/Phil McCarten