More Stars Who've Stripped for PETA

What a total Betty!

"Clueless" star Alicia Silverstone is the latest celeb to strip down to her birthday suit for PETA's "I'd Rather Go Naked Than Wear Wool" campaign, which aims to raise awareness about how wounded sheep get in the shearing process.

With her bare booty on display, Silverstone gazes at the camera with a sheep mask in her hand.

"It's just so fast, the shearing process," she says. "[The sheep are] cut, they're harmed. They get very seriously wounded, and there's no care for them when they're wounded. It's just, 'Move on to the next.'"

The actress -- who is also a proud vegan -- is urging others to make this a "Wool Free Winter."

"Why not make that leap?" she muses. "Say, 'I'm never going to buy wool again.'"

Silverstone isn't the only star who's stripped down for PETA, Eva Mendes, P!nk, Olivia Munn, Taraji P. Henson, Elisabetta Canalis, and Penélope Cruz have all bared their bods to raise awareness about animal protection.