Kim Kardashian celebrates her 31st birthday in Las Vegas

Slideshow posted in Photos | Sunday, October 23, 2011

11 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 / WireImage / Denise Truscello)

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