NSFW: Alicia Silverstone Goes Nude For a Good Cause

If there's one thing Alicia Silverstone isn't clueless about, it's animal cruelty. The actress and longtime animal rights advocate stars in PETA's latest campaign dedicated to boycotting wool. Alicia poses completely bare in a lush green forest for the ad, which proclaims "I'd Rather Go Naked Than Wear Wool. Wear Vegan" and debuts outside Times Square in NYC this week. One thing's for sure: that vegan diet is doing her body very good.