Kim Kardashian

Kim Kardashian Flaunts Major Cleavage at Birthday Party in Las Vegas (PHOTOS)

It's a big year for our girl Kim Kardashian.

Not only did the reality TV star get engaged to Kanye West on her birthday on October 21, but she also threw a huge party in Las Vegas, Nevada over the weekend to celebrate the big 3-3. Kim took off diaper duty for the night, hitting the red carpet at TAO with her sisters Kourtney and Khloe, her mom Kris Jenner, and her hubby-to-be Kanye.

While Kim didn't step out in a full birthday suit for the evening, she did flaunt her curves in a super sexy, cleavage-baring white dress. Her sisters also spiced things up for the night out, with Kourtney rocking a cropped top and a leather skirt, and Khloe donning a deep v-neck dress and thigh-high boots.

Click through the gallery to see this Keeping Up With the Kardashians clan having a fun night out for Kim's birthday. What do you think of their sexy party styles? Weigh in below!