Taylor Swift, Miley Cyrus Join American Music Awards Lineup

Taylor Swift performs "Back to December" at the 44th Annual CMA Awards at the Bridgestone Arena on November 10, 2010 in Nashville, Tennessee.

Country besties Taylor Swift and Miley Cyrus will perform on this year's American Music Awards (airing Nov. 21 on ABC), it was revealed during Wednesday's CMA Awards.

Kid Rock, whose new album, "Born Free," comes out Nov. 16, also joins the lineup, which includes previously announced acts P!nk, Usher, Ne-Yo, Diddy, Bon Jovi and Rihanna, who will open the show.

Eminem, Lady Antebellum Lead American Music Award Nominations

The fan-voted performance-packed event, now in its 38th year, boasts several first-timers to the broadcast: Justin Bieber, Katy Perry and Ke$ha (all nominated for artist of the year), along with newly formed super group NKOTBSB -- or New Kids On The Block and Backstreet Boys to the uninitiated -- who'll tour together next summer.

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