Bikini-Clad Maria Menounos Dances With Shirtless Derek Hough

Derek Hough and Maria Menounos. Credit: Bryan Steffy/Getty

Maria Menounos and Derek Hough can't stop the beat!

The Dancing With the Stars partners practiced their new moves at Bud Light Lime's 'Lime-A-Rita' Cinco de Mayo party in Las Vegas Saturday. Menounos, 33, showed off her super fit body in a lime green bikini, while Hough, 26, flaunted his rock-hard abs while lounging poolside.

"I wasn't trying to lose weight, but it's definitely gone down," Menounos recently told Us Weekly of her Dancing With the Stars slimdown.

"I like to jog and I try to focus on floor-based Pilates to strengthen and lengthen," the 5-foot-8 star added. "I'm not someone who carries any kind of serious routine. I try to keep a healthy attitude about it. I deal with whatever it is. The most I will do before a beach trip is run a few nights before."

What about Hough? In addition to dancing, the pro told Us he's "just a naturally active person."

Dancing With the Stars airs Monday at 8 p.m. EST on ABC.