Kylie Jenner birthday catsuit
photo: Splash

Kylie Jenner kicked off her birthday month with an epic bash at The Nice Guy club in Los Angeles on Sunday. All of the Kardashian/Jenner sisters were there, along with a who's who of the young Hollywood crowd that included Chris Brown and Karrueche Tran. But Jenner made sure all eyes were on her. 

She stepped out in a nude illusion catsuit and a sick gold-and-black belt.

Kylie Jenner sheer catsuit.
photo: Splash

The lace Balmain piece looked like it was painted on. (click for video)

Forget eyebrows — her curves were dangerously on fleek. (click for video)

The sexy vibe was definitely a family affair, as per usual.

Kendall Jenner Kylie Jenner Birthday sheer outfit
photo: Splash

Kim debuted a new angular haircut and continued her love affair with corsets.

kim kardashian haircut
photo: Splash

Kourtney was a cross between "Tomb Raider" and "50 Shades."

kourtney kardashian leather outfit
photo: Splash

And Khloe embraced her alter ego, KhloMoney.

We can't wait to see the outfits for Kylie's actual birthday, August 10.