NEW YEAR’S WEEKEND LAS VEGAS-STYLE

DJ ATB performed Friday night at Marquee (Cosmopolitan). ATB, a German DJ, was ranked 11 in "DJ Magazine" in 2009 and 2010. Actor Wilmer Valderrama was spotted. (Photo courtesy of Brenton Ho).

Dutch UFC heavyweight Alistair Overreem, far right, celebrated his first round TKO victory against Brock Lesnar at an after-party at Surrender Nightclub at Encore with special guest DJs Lil Jon and Sidney Samson. (Photo courtesy Bryan Schnitzer)

Axl Rose performed with his band Guns N’ Roses Friday night at The Joint (Hard Rock). Guns N' Roses will perform another sold out show on New Year's Eve. (Photo courtesy of Scott Harrison/ Retna).

DJ Pauly D hosted and performed Friday night at Vanity (Hard Rock). Pauly D is best known as one of the stars of MTV's "Jersey Shore." (Photo courtesy of Erik Kabik/ Retna/ erikkabik.com).