Jennifer Aniston Goes Topless in New Water Ad

Steven Klein/ Smartwater

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.

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."

Click through to see more from the sexy new campaign!