Kelly Clarkson! Adele! Katy Perry! See who got busy celebrating way into the night
Credit: Angela Weiss/WireImage
Updated: Monday Feb 11, 2013 | 10:00 AM EST
By: Kiran Hefa & Kate Hogan
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He's somebody everyone knows now! Gotye lends his signature to an already star-studded guitar during the Stand Up for a Cure Republic Records Grammy party in Hollywood.
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