Kim Kardashian says people are always surprised by how skinny she is. The brunette beauty - who is currently competing on U.S. TV talent show "Dancing With the Stars" - insists her famously large behind makes fans think she is curvy all over.

She said: "I look a lot bigger on TV. When I meet people, the first thing they say is, 'Wow, you're so much smaller than I thought'. I look about 15 lbs heavier. I'm only 115 lbs, and everyone thinks I'm like 130 or 140. It's bizarre. I'm a U.S. size 2!"

Kim Kardashian gave her boyfriend a sneak preview of her routine with the Pussycat Dolls via webcam.

The curvy socialite was so keen to find out what lover Reggie Bush thought of her sexy outfit and raunchy dance moves that she put on a private showing for him ahead of her live performance with the dance troupe in Las Vegas on Friday night.