The live lineup for this year's Teen Choice Awards is taking shape, and it's as star-studded as you'd expect.

OneRepublic and Selena Gomez & the Scene -- both, not coincidentally, among 2011's top nominees -- have been confirmed to perform at the ceremony, airing August 7 on FOX.

Gomez is up for five awards: Choice Music Group with the Scene, Choice Music Single for ‘Who Says,’ Choice Love Song for ‘Love You Like a Love Song,’ Choice TV Actress and Choice Female Hottie. Meanwhile, OneRepublic is vying for Choice Rock Group and Choice Rock Track for their hit 'Good Life.'

The list of stars lined up to appear at the Awards also includes Rebecca Black, Avril Lavigne, Kat Graham, Joe Jonas, Cameron Diaz and the Kardashians -- as well as Gomez's boyfriend, Justin Bieber, who isn't scheduled to perform.

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