The secret to Elisabetta Canalis' super-toned stomach? Tacos!

George Clooney's ex-girlfriend is training so hard for her stint on the new season of Dancing With the Stars, that she can eat whatever she wants and still maintain a rock-hard six-pack.

PHOTOS: See Elisabetta and the rest of the DWTS in sexy costumes

The 32-year-old stunner was spotted ordering a snack from a taco truck while taking a break from practicing for the show in Hollywood on Thursday.

Canalis showed off her jaw-dropping midriff in a sports bra and sweatpants. She was joined by fellow contestant Chaz Bono, 42, and her dance partner Valentin Chmerkovskiy.PHOTOS: George and Elisabetta's sexy romance

The Italian model recently bared it all in an anti-fur ad for PETA. "I decided to go nude because I think that nudity always creates a big reaction," said Canalis, who split with Clooney over the summer. "That is what is required to keep people's attention on such a brutal practice. These poor animals are electrocuted, skinned alive, drowned, and bludgeoned just for the sake of fashion."

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