Kim Kardashian: 'Posing Naked Makes Me Nervous'

"Extra" caught up with Kim Kardashian at her extravagant birthday bash on Friday, held at TAO nightclub at the Venetian in Las Vegas -- and she dished all about her naked W magazine photo shoot, plus the lavish gift she purchased for herself.

"No matter what, a nude photo shoot definitely make you a little bit nervous," she said about being W's November cover girl. "The fact that they wanted me for their art issue was such an honor, and I'm so glad the final product was amazing."

Photos: Kim Kardashian with Mario at The Grove!

Kim is turning the big 3-0 on Thursday, and to say goodbye to her '20s, she bought herself a $250,000 Rolls-Royce Ghost.

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"I buy myself a birthday and Christmas gift each year and I thought at 30 I'd go all-out," said the "Keeping Up with the Kardashians" star.

The girl who has everything can always use more. TAO gave the reality starlet a pair of Everlon diamond earrings and her sisters gave her a pair of Christian Louboutin heels.

"I actually tripped on my own shoe walking and I cut my toe," Kardashian said.

After partying it up in Vegas, Kim returned to NYC where she celebrated her birthday once again at New York's TAO restaurant on Saturday.