"Thank you for supporting me for three decades. Without you I truly wouldn't be here," she said.
Pitbull made two appearances, one with Jennifer Lopez and another with Christina Aguilera. His hit with Aguilera, "Feel This Moment," samples A-Ha's "Take On Me" and Morten Harket came out to sing a line from the song.
Comedian-actor Tracy Morgan was the show's host, and he dressed as Psy in a bright yellow suit when the rapper-singer was onstage to present an award. They had a dance battle to Psy's new single, "Gentleman."