Kelly Osbourne parties at XS Nightclub.

Last night, Kelly Osbourne ditched her evening gown and put on a ravishing party dress as she headed to XS Nightclub at Encore Las Vegas following her hosting duties at the Miss USA pageant. The blonde beauty took her new role as fashion expert on E’s “Fashion Police” and dished her critiques to the beauty queens, commenting on their style throughout the broadcast.

Once her job was complete, she kicked up her heels in a black shimmery cocktail dress and headed to Encore to hear Manufactured Superstars spin at the renowned weekly Night Swim event, Vegas’ premier after-dark pool party. She even sported the signature glasses seen throughout the club when the electronic duo perform at XS.

Across the venue, Scottish heartthrob Gerard Butler enjoyed the evening with a group of his closest friends. “The Ugly Truth” actor was seen reveling into the early hours of the evening in one of XS’ posh VIP tables.

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