Katy Perry and John Mayer were among the stars who attended Universal Music's post Grammy party on Sunday, celebrating an evening that is the music industry's biggest night. The elegant afterparty took place in downtown LA at The Theatre at Ace Hotel. Perry posed for photos on the red carpet, as boyfriend Mayer snapped pictures from his own camera. Newcomer Kacey Musgraves won the Grammy for best country album. She talked about the support she received from her band onstage.
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