Kelly Clarkson! Adele! Katy Perry! See who got busy celebrating way into the night
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Updated: Monday Feb 11, 2013 | 10:00 AM EST
By: Kiran Hefa & Kate Hogan
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Shedding his suit and tie (and possibly his expectant fiancée), Wiz Khalifa opts for a more party-ready ensemble at the star-studded Warner Music Group/InStyle fête.
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