Kim Kardashian celebrates her 31st birthday in Las Vegas

Slideshow posted in Photos | Sunday, October 23, 2011

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