What happens in Vegas, never stays in Vegas. This past Friday, Feb. 26, the academy award winner, Charlize Theron was seen sipping on vodka sodas at The Bank Nightclub in Vegas at the Bellagio dancing all night and partying until the sun came up.

The Monster star cut lose until the wee hours and danced away with a bunch of guy friends, who were dancing on the club’s banquettes while taking shots of Stoli blueberry – yum.

Saturday night, wasn’t a quiet night either. Songstress and actress, Mariah Carey was also spotted in sin city, wrapping her 25-city tour across the U.S. The known-to-be-diva, commemorated the occasion with an official after-party at the Haze Nightclub in Vegas at the Aria Resort and Casino.

She was flying solo, and wearing a skin-tight navy blue Herve Leger dress. Before the party was over, she was presented with a two-tier hot pink cake decorated with the titles of all her albums and adorned with butterflies along it.

Also present, was Grammy winner Ciara, who hit the stage and rocked the crowd with some of her smashing hits, like “Goodies” and “Oh.” The crowd was full of celebrities including boxer Floyd Mayweather Jr., Chris Ivery, Elle Pompeo’s main squeeze, and Joe Jackson.