Sander Van Doorn performed at Marquee Nightclub at the Cosmopolitan of Las Vegas on Friday night.

Last night, rapper, singer and producer J. Cole celebrated his 27th birthday at Lavo at the Palazzo.

After performing at his sold out concert Saturday night, Kid Rock hosted an after-concert party at Tao at the Venetian. The rocker was joined by a large group of friends including Uncle Kracker and Rande Gerber, and the group sat in a section of VIP tables where they drank Jim Beam and Miller Lite.

The grand opening weekend of 1 OAK Las Vegas at the Mirage concluded on Saturday with a star-studded event. Bringing the best of the Big Apple to Vegas, 1 OAK welcomed its weekly I Love New York Saturday night party with the nightlife brand’s resident deejays from New York including DJ Jesse Marco on the decks last night.

On Saturday night, “Twilight” superstar Peter Facinelli, looking dapper in a gray suit, hosted at Chateau Nightclub & Gardens inside Paris Las Vegas.

Bow Wow performed a few of his songs live including his new hit single “Sweat” at Rain Nightclub inside the Palms Friday night.

Flavor Flav was spotted last night at Surrender Nightclub inside Encore Las Vegas partying with Surrender resident DJ Lil Jon, who performed a crowd-pleasing high energy set.

On Friday night, 1 OAK held its kick-off party for its grand opening weekend. Katy Perry, Markus Molinari, Paris and Nicky Hilton, David Arquette joined by girlfriend Christina McLarty, Patricia Arquette, Rosetta and Balthazar Getty, Scott Disick, Chris Evans, Christina Milian, Shenae Grimes, Michelle Trachtenberg and more were on hand to help with the celebration at the new club at the Mirage.

On Friday night, Buca di Beppo’s Excalibur location immortalized Holly Madison, star of “Peepshow,” Laura Croft, host of “Night School 4 Girls,” Frank Marino, star of “Divas Las Vegas” and recent appearance on “Millionaire Matchmaker” and Nathan Burton, star of “Nathan Burton Comedy Magic” in marinara sauce.