Kim Kardashian celebrates her 31st birthday in Las Vegas

Slideshow posted in Photos | Sunday, October 23, 2011

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