LAS VEGAS - OCTOBER 15: (L-R) Khloe Kardashian, Rob Kardashian, Kim Kardashian and Kourtney Kardashian celebrate Kim Kardashian's birthday at TAO Bistro at the Venetian on October 15, 2010 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
LAS VEGAS - OCTOBER 15: (L-R) Khloe Kardashian, Rob Kardashian, Kim Kardashian and Kourtney Kardashian celebrate Kim Kardashian's birthday at TAO Bistro at the Venetian on October 15, 2010 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)