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Michael Buble is one busy crooner! Not only is he the self-proclaimed "Christmas Prostitute," he's also a pretty funny guy, serving up a great comedy sketch this weekend on "Saturday Night Live."

Catch Buble's comedy in a hilarious spoof commercial promoting a "Duets" CD with Lady GaGa, Justin Bieber, Taylor Swift, Sting, Scotty McCreery and others. Then check out Michael's live performances of "Holly Jolly Christmas" and "Have Yourself A Merry Little Christmas" after the jump.

Michael Buble's live performance of "Holly Jolly Christmas" on SNL.

Michael Buble also performed "Have Yourself A Merry Little Christmas" on Saturday Night Live.

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