Photos Of The Week: Katy Perry, Nicki Minaj, Justin Bieber, Jennifer Lopez

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Mark Zuckerberg and Katy Perr

Katy Perry kicked it with Facebook creator/founder Mark Zuckerberg, Nicki Minaj donned a gumbi wig, Justin Bieberplayed dress up, Christina Aguilera made kissy faces,Jennifer Lopez got her behind "Off The Floor" for a picture,Prince and Jimmy Fallon rocked out and Keri Hilsonserenaded Quentin Tarantino. It all happened this week and we've got the pics to prove it.

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