Britney Spears shows off her tight tummy and dance moves in a just-released commercial for Twister Dance.

Dressed head to toe in black and silver, the 30-year-old "X Factor" judge whips her hair and moves her body to a remix of "Till the World Ends" in the new spot.

In a press release from Hasbro, Britney says "Dancing has been such an important part of my life since I was a little girl. As soon as I saw the new TWISTER DANCE game, I knew I wanted to be involved. I think kids will love rocking the spots and dancing to the music as much as my boys and I do. It’s a lot of fun!”

The new game combines pop music with the classic game, showing players where to place their feet along to the beat of songs from Britney, Ke$ha and Willow Smith. You can also attach any .mp3 player to the game and turn any song into a routine.

For more info, check out the Hasbro website.

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