Kim Kardashian celebrates her 31st birthday in Las Vegas

Slideshow posted in Photos | Sunday, October 23, 2011

5 of 23: Lamar Odom, Khloe Kardashian, Kris Jenner, Kim Kardashian and Kris Humphries arrive at Kim Kardashian's birthday party at her birthday at Marquee Nightclub at the Cosmopolitan in CityCenter on October 22, 2011 in Las Vegas, Nevada. (Photo/Denise Truscello)