WATCH: Gaga Sings Frank Sinatra At Hollywood Party

The thing to remember about Lady Gaga is that she will likely continue to surprise you - especially if you keep thinking of her as just some outrageous dance/pop diva. Gaga is a serious singer and musician, and she let the world get a taste of that when she teamed up with Tony Bennett to do an album of Christmas music. Here, Gaga makes an unannounced singing appearance at a party in Hollywood and tackles classic Frank Sinatra, with Fly Me To The Moon, giving it a fairly unique treatment. I would think Frank would have loved to had the chance to do a duet with this nice Italian girl from the neighborhood!



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