Lisa Edelstein thinks it's time to clean house. The former House, M.D. star is the latest to go nude for an ad that promotes a greener earth and safer animals.

"I like to encourage people to eat vegetarian once a week," Edelstein says in the video ad, sponsored by People for the Ethical Treatment of Animals (PETA). "That alone would make such an enormous impact for the whole world."

Watch the video here: