Khloe KardashianKhloe KardashianForget about keeping up with this Kardashian.

For Khloe it's all about keeping fit and slimming down.

The reality TV star has dropped an amazing 20lbs since shedding her clothes for a Peta shoot last December.

She stepped out at her birthday bash in Las Vegas this week looking like one seriously hot mama in a clinging black minidress.

But Khloe's the first to admit that her new figure has taken some hard graft. Khloe Kardashian before picKhloe Kardashian

"I've changed my eating. Eating is my hardest problem," she revealed. 

"I need sweets. That's my major problem. And I've been killing myself at the gym." 

Khloe's also been showing off her bootylicious new bod on her latest reality TV show, Kourtney And Khloe Take Miami.

"I actually was in a bikini on camera," she exclaimed.

"I've never done that and I wouldn't have ever thought to do that."

A major sweet-tooth, a serious fear of bikinis - Khloe's a girl after our own hearts.