kourtneyk_090113.jpg

When the kids are away, Kourtney Kardashian will play.

The eldest Kardashian partied in Las Vegas solo in the midst of her family drama. Her boyfriend Scott Disick (a.k.a. Mr. Vegas) must have stayed home with the kids while Kourt had a girls' night in Sin City.

Kourtney hosted a Labor Day bash at Hyde Bellagio nighclub on Saturday, showing off her hot bod in a curve-hugging black lace jumpsuit. It's hard to believe she gave birth just a year ago.

kourtneyk2_090113.jpg

The Keeping Up with the Kardashians star was greeted at the club by sparklers and signs spelling out her name. She and her gal pals danced the night away to the beats of DJ Eric D-Lux. Things got more bizarre after 2 a.m. when a life-size zebra delivered Dom Pérignon to the girls. What happens in Vegas ...