People for the Ethical Treatment of Animals has employed many shocking tactics to raise awareness for animal rights, vegetarianism and the cruelty of the fur industry, but few have been as effective as their billboards with naked celebrities.

Check out the biggest celebrities who posed for PETA and find out which causes touched them enough to convince them that going naked was the right thing to do.

Pamela Anderson

After appearing on more Playboy magazine covers than anyone else in the history of the magazine, Pamela Anderson had no qualms about taking her clothes off for a worthy cause. 

Pamela Anderson For Peta Campaign

The blonde bombshell is one of PETA’s biggest supporters and has been featured naked on billboards for many campaigns, including “Give Fur The Cold Shoulder” and “Turn Over a New Leaf: Try Vegetarian”.

Khloe Kardashian

Khloe Kardashian For Peta Campaign

Even though she’s one of the celebrities who posed for PETA, Khloe Kardashian has distanced herself from the organization in recent years. She was part of PETA’s 2008 “I’d Rather Go Naked Than Wear Fur” campaign, but decided to cut ties with the animal rights activists after her sister Kim was attacked with flour for wearing fur by a PETA supporter.

Taraji P. Henson

Taraji P. Henson For Peta Campaign

The Academy Award nominated actress and “Person of Interest” star decided to take a stand against the fur industry after being touched by the “I Am An Animal” HBO documentary. She posed for the “I’d Rather Go Naked” campaign in 2011 and explained that “We’re not just even talking about a full-length fur coat. I’m talking about just, like, fur on your gloves or on your jacket or – what goes into making that little piece of fur ripped my heart out.”

Eva Mendes

Eva Mendes For Peta Campaign

The biggest name out of all the Latino celebrities who posed for PETA, Eva Mendes joined the anti-fur cause in 2007. “Some people still see wearing fur as glamorous and a sign of prosperity. Personally I think wearing a baby chinchilla says, ‘I’m ignorant,’ vs. saying ‘I’m a badass.’ I don’t think you can force people to change their attitudes, but you can help to educate them and to lead by example,” Mendes explained.

See also: Best Cruelty Free Makeup Brands 

Christy Turlington

Christy Turlington For Peta Campaign

One of the first celebrities who posed naked for PETA, Christy Turlington was also the first supermodel who spoke out against fur in fashion. Her involvement with the animal rights activists precedes even Pamela Anderson’s since Turlington posed for an anti-fur billboard in 1993, helping bring  the “I’d Rather Go Naked Than Wear Fur” motto to the mainstream.

Olivia Munn

Olivia Munn For Peta Campaign

Considered too racy for billboards, Olivia Munn’s “Who Needs Fur to Feel Beautiful” PETA campaign had to be edited before being displayed in public. The actress joined the growing list of celebrities who posed for PETA in 2012 and even shot a video for the organization, exposing the cruel treatment of animals in Chinese fur farms.

Chad Johnson

Chad Johnson For Peta Campaign

Known as Chad Ochocinco during his tenure at Cincinnati Bengals and Miami Dolphins, the wide receiver participated in a different anti-fur campaign for PETA, under the “Ink, Not Mink” slogan in 2010. “To tell you the truth, when I was younger growing up, I thought it was all fake – they didn’t really kill animals,” he explained when joining the cause.

Wendy Williams

Wendy Williams For Peta

Many celebrities who posed for PETA are former fur wearers, and Wendy Williams explained why her stance on the issue changed over the years: “As a former fur wearer, I must say that I have not given fur any thought for a good seven years. I don’t think that fur is a mark of success anymore. As a decent person with compassion, it just seems like the right thing to do.”

Dennis Rodman

Dennis Rodman For Peta

The first man and the first athlete to pose for PETA’s “I’d Rather Go Naked Than Wear Fur” billboards, Dennis Rodman returned for another photoshoot with the “Ink, Not Mink” campaign, which also featured Willis McGahee, Tony and October Gonzalez, Tim Howard, Chris Andersen, Ty Lawson, Steve-O, and Tommy Lee.

Lisa Edelstein

Lisa Edelstein For Peta

Joining the list of celebrities who posed for PETA in 2012, Lisa Edelstein chose to support the “Go Vegetarian” campaign, after more than 30 years of not eating meat.