Super Bowl Halftime Show: Usher, Slash to Make Surprise Appearance

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They'll join the previously announced Black Eyed Peas.

Usher and Slash will make a surprise appearance at the Super Bowl, the Associated Press reports.

An inside source tells the AP that the singer and former Guns 'N Roses guitarist will perform alongside the Black Eyed Peas at the game this Sunday between the  Pittsburgh Steelers and Green Bay Packers at Cowboys Stadium.

Black Eyed Peas' is featured in Usher's song "O.M.G." Slash also collaborated with Fergie on her tune "Beautiful Dangerous," and he performed the Guns 'N Roses song "Sweet Child o' Mine" on tour with the Peas.

U2, The Rolling Stones, Britney Spears, N*Sync, Paul McCartney and Prince have performed at past Super Bowls.