The three join previously announced performers Justin Bieber, Katy Perry, Ke$ha, Christina Aguilera, Bon Jovi, NKOTBSB (a.k.a. New Kids on the Block with Backstreet Boys), Ne-Yo with Diddy's Dirty Money, and Rihanna, who will open the show.
The show will air live on ABC on Sunday, November 21, at 8 p.m. ET.
Eminem and Lady Antebellum lead the nomination race for the 2010 American Music Awards, both with five nominations. Bieber received four nominations, while Perry, Ke$ha, B.o.B and Usher all got three nominations each.
For the fourth year, winners will be determined by online voting at the official Coca-Cola voting location www.amavote.com as well as ama.abc.com. Artists will be honored in the categories of Pop/Rock, Country, Rap/Hip-Hop, Soul/R&B, Alternative, Adult Contemporary, Latin, Soundtracks and Contemporary Inspirational.