Jennifer Aniston shows off her sexy side by going topless in a new campaign for smartwater.

The campaign features Aniston, 42, posing in a series of black and white photos for Glaceau's bottled water brand.

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A caption in the topless new ad reads: "Smart because simplicity should be savored." In another ad featuring the 'Horrible Boss' star stepping out of a limo in a dark dress, the copy reads: "Smart because taste never goes out of fashion."

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Click through to see more from the sexy new campaign!

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