Kristen Johnston has become the latest celebrity to pose nude for PETA. The former "3rd Rock from the Sun" star - who recently caused concern with her drastic weight loss - poses as Lady Godiva, naked and astride a horse, in the photograph which debuted in New York's Central Park Thursday.

The 41-year-old actress has joined forces with the animal rights group to campaign against the horse-drawn carriage rides on offer in New York.

Two-time Olympic gold medalist Amanda Beard poses nude for the latest PETA(People for the Ethical Treatment of Animals) ad.

Beard's ad, "Be comfortable in your own skin, don't wear fur," was released just a few days before the Olympics at the Athletes Village in Beijing, where she was preparing for the 2008 Olympics.

Paul McCartney proudly declares he is a vegetarian. In a new People for the Ethical Treatment of Animals (PETA) ad campaign entitled "I Am A Vegetarian," the Beatles legend has strike a pose and dishes why he decided to stop eating meat.

In the ad, the 65-year-old rock royalty states:

Alicia Silverstone fears being overshadowed by Britney Spears. The "Clueless" star has opted out of guest starring in "How I Met Your Mother" because the pop singer is also starring in the same episode, it has been claimed.

Silverstone was supposed to play a hot doctor that lead star Ted, played by Josh Radnor, has a serious crush on. But apparently, the 31-year-old actress bailed out after learning the doctor's receptionist will be played by Spears, which might possibly overshadow her.