The performers will join Katy Perry and Pitbull, who were previously announced as performers.
Winners will be determined by fans voting online at amavote.com or ama.abc.com.
The show will be broadcast from the Nokia Theatre in downtown Los Angeles on Sunday, Nov. 20 at 11 p.m. PT on ABC.
ABC will air a live pre-show "Countdown to the American Music Awards" at 10 p.m. PT.
