Dancing does the body good!

Cameron Diaz shows off her six-pack in a skimpy costume on "Celebrity Dance Factor."

Don't fret if you haven't heard of the "Dancing with the Stars"-esque competition. It's a fictional show created for Lionsgate's new film "What to Expect When You're Expecting."

In the comedy, in theaters May 18, Cameron plays a fitness guru named Jules Baxter who falls for her sexy "Celebrity Dance Factor" partner Evan (Matthew Morrison). We've seen Matthew's moves on "Glee," but who knew Cameron could shake and shimmy. Check out the clip below!

Did you catch the cameos by Whitney Port and Dwyane Wade as Jules' competition? Choreographer Tyce Diorio, ousted "X Factor" judge Cheryl Cole and Taboo of the Black Eyed Peas make up the judging panel.

"Celebrity Dance Factor" parodies "Dancing With the Stars," complete with over-the-top costumes, shirtless stripdowns and feuding judges.

Check out more of "Celebrity Dance Factor" here, and watch the hilarious "What to Expect When You're Expecting" trailer below.