Kim Kardashian had an intimate birthday dinner at The Darby in NYC on October 21, the night she turned 31.
But, the day after, Kim packed her bags and headed to Las Vegas for a full-blown birthday celebration at Marquee Nightclub inside The Cosmopolitan Hotel.
Kim celebrated the big 3-1 alongside her hubby Kris Humphries, as well as her mother Kris Jenner, sister Khloe Kardashian and her hubby Lamar Odom, inside the famed Marquee. DJ Cedric Gervais provided the night's entertainment.
The clan worked the red carpet before heading to the club's VIP area. During the festivities Khloe got the crowd to sing "Happy Birthday" to Kim as she was presented with a sports car cake.
Kim tweeted about the celebratory plans ahead of time, saying, "Get ready Vegas! Marquee will be kray 2nite! Heard @KhloeKardashian @RealLamarOdom & @KrisJenner came 2 surprise me! I saw on twitter hehe"