ENTERTAINMENT

Jennifer Aniston Bares Ripped Stomach For Smart Water Ad (PHOTO)

05/18/2010 12:44 pm ET | Updated May 25, 2011

Jennifer Aniston shows off her tight tummy in a new ad for Smart Water.

"Working out feels great...afterwards," the ad's copy reads. "That's why I drink Smart. It's hydration I can feel. (And it's one part of my routine I never sweat.)"

Jen has denied being put on the baby food diet by Gwyneth's trainer, Tracy Anderson.

"Sorry, but the last time I had baby food, I believe I was 1," she told People. "I've been on solids for about 40 years now."

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