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Sept. 13: Lil Mama joins Jay-Z and Alicia Keys onstage at the VMAs

Kanye wasn't the only stage-rusher at the VMAs. At the end of the show, Jay-Z and Alicia Keys performed with an unexpected companion: Toward the end of the set, rapper Lil Mama stood and danced next to Jay-Z until the song ended. Then she struck a pose and stalked away. Wire Image