Beyonce Makes a Backstage Surprise at L.A. Dance Show, Freaks Out the Troupe (VIDEO + PHOTO)

Beyonce freaked out a dance troupe in L.A. when she popped in backstage after their show … and gave ‘em some huge props. Bey and mom Tina Knowles hit up the Alvin Ailey American Dance Theater show Saturday night at the…

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