Bikini-Clad Maria Menounos Dances With Shirtless Derek Hough

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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.

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Credit: Bryan Steffy/Getty

"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.

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Credit: Bryan Steffy/Getty

"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."

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Credit: Bryan Steffy/Getty

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.