How does Mad Men star Jessica Paré (aka "Megan Draper") keep her svelte figure? A vegetarian diet. Jessica told People magazine, "It's amazing what your diet can do for your skin." And Vincent Kartheiser isn't really a bad boy—he just plays one on TV. In real life, Vincent eats cruelty-free, too.

Los Angeles chef Roy Choi gained fame for his Kogi BBQ food truck, but he has turned his back on meat, earning him props from animal advocates and a slew of goodies from PETA.

And Scarlett Johansson credits vegan foods with helping her get ready for that Avengers bodysuit.

When vegan powerhouses collide: Catch the conversation that everyone's favorite vegan former POTUS, Bill Clinton, had with Ellen DeGeneres and prepare to swell with vegan pride.

Disturbed at how Ukraine is cruelly killing stray animals before the Euro 2012 football championship, the always gorgeous vegetarian beauty Pamela Anderson wrote to the president of the Union of European Football Associations imploring him to support spaying and neutering as a way to control animal overpopulation. Then, while she was in Mumbai, Pam was so stricken by the plight of the many homeless dogs roaming India's streets that she adopted one to join her family of rescued dogs.

Never one to miss an opportunity to speak up for animals, Pam joined other celebrities in tweeting for them this week:

Diane Keaton found an opportunity to promote animal adoption during an appearance on The Tonight Show. The witty star of the new film Darling Companion and longtime vegetarian introduced the audience to Clover, a dog up for adoption, and said, "Clover looks like Jay … except without the chin."

The crooning voice of Enrique Iglesias was music to one dog's ears. The sultry singer expanded his dog family to three, with a rescued German shepherd.

And country songbirds Kellie Pickler and Laura Bell Bundy both chose animal-friendly professions for their appearances on Great American Country's Day Jobs. Sexiest Vegetarian alum Kellie worked at a sanctuary with elephants rescued from circuses and zoos, and PETA pal Laura prepped a homeless dog from Emmylou Harris' animal shelter, Bonaparte's Retreat, for her big "audition" for a potential adoptive family.

To keep up with what all your favorite celebs are doing for animals, follow @PETA on Twitter.

Arrested Development is coming back! Squeals of joy reportedly reverberated through the Twitterverse when the show's creator, Mitch Hurwitz, announced that the series will return for a limited run, followed by a movie. We can't wait to see more of the lovely and compassionate Portia de Rossi and fuzzy funnyman David Cross.

And while we're talking man candy, check out what vegetarian UFC fighter Jon Fitch had to say about milk: “Milk and dairy is poison. It’s poison. There’s nothing good about it for you to put it in your body.”  For Blink-182 drummer Travis Barker, it was the plane crash that nearly took his life that made him want to adopt a healthy vegan diet. He told Rolling Stone: "I've been vegan since I got out of the hospital. It's another eye-opener."

The ladies aren't lagging behind in grabbing cruelty-free fare: Scarlett Johansson is into baking vegan breads, cakes, and muffins, and the WNBA's Taj McWilliams-Franklin said that dumping meat has helped her keep her weight down, recover from injuries faster, feel better, and have more energy.

It's Kathy Griffin's rescued dogs who make her feel like a million bucks barks. She told OK! magazine, "They offer unconditional love, and that's all they ask for in return."

Written by Michelle Sherrow

Gorgeous, voluptuous, and sexy: All of those words describe actor/singer Scarlett Johansson. And now that she's the newest luminary to show support for the Healthy School Meals Act, we can add "humanitarian" and "friend to animals" to the list.

© Star Max Inc.

If launched, this $4 million pilot program will ingrain (sorry, couldn't resist) vegetarian food and drinks into school districts' lunch programs over a two-year period. In her letter, Scarlett points out, "Millions of families in America rely on subsidized school lunches, and these meals are absolutely crucial to children's well-being." The Healthy School Meals Act will give kids a chance to develop healthy eating habits that center on nutritious plant-based fare, instead of body parts from stressed, mutilated, and exhausted animals.

By joining Spiderman's Tobey Maguire and health experts around the country in this effort, Scarlett has revealed her smarts and her 24-carrot heart of gold. (Oh, yes, I did.)

Written by Karin Bennett