Taylor Swift and Miley Cyrus perform togather at American Music Awards: The American Music Awards continue to add mega-star wattage to their performance lineup. Taylor Swift, Miley Cyrus and Kid Rock were announced as additions to the roster Thursday (November 11). The trio join previously announced acts Justin Bieber, Katy Perry, Ke$ha (who are all nominated for Artist of the Year), Bon Jovi, Pink, Usher, Ne-Yo, Diddy, New Kids on the Block and Christina Aguilera, who will perform a number from her upcoming movie "Burlesque."

Eminem and Lady Antebellum lead all AMA nominees with five apiece. Eminem is nominated for Favorite Male Artist in both the Pop or Rock (up against Bieber and Usher) and Hip-Hop categories, Favorite Album in both the Pop or Rock and Hip-Hop categories, and Artist of the Year (where he'll face off against Lady Gaga, Perry, Bieber and Ke$ha). Bieber will compete for Favorite Male Artist - Pop or Rock, Artist of the Year, Breakthrough Artist of the Year and Album of the Year - Pop or Rock for My World 2.0.

"As a small-town kid from Canada, I never imagined that I would be nominated for AMAs, let alone be performing on the show," Bieber said, according to The Associated Press, which added that the 16-year-old professed to feel "extremely humbled and honored" by the invitation to play the show.

"Justin, Katy and Ke$ha have been on the top of the charts all year long. We are happy to see each of them make their own AMA history," AMA producer Larry Klein said in a statement announcing the performers.