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Pamela Anderson Strips Down For 'Psycho'-Inspired PETA Ad

05/20/2015 01:06 EDT | Updated 05/20/2015 05:59 EDT

Wasting water is a scary thing — just ask Pamela Anderson.

The 47-year-old B.C.-born actress has stripped down (once again) to protest the horrorsof the meat and dairy industry for a "Psycho"-inspired PETA ad.

In the black-and-white pic, which was photographed by David LaChapelle, the "Baywatch" actress and longtime PETA-advocate poses nude in the shower. She's protecting her modesty with a strategically placed towel, and has a look of sheer terror on her face. Dramatic cat eyeliner and loose curls add to the Hitchcock-feel of the ad.

pamela anderson

The campaign also targets the ongoing water restrictions in California due to a historic drought, declaring that the solution isn't just shorter showers -- it's also turning off the tap that supplies animal agriculture.

"Making a splash for the environment doesn't just mean shorter showers," Pam says. "Try vegan."

The full-ad campaign will be revealed on "The Ellen DeGeneres Show" on Thursday.

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