Leona Lewis and James Cameron are the latest compassionate celebrities to embrace vegan eating. Not surprising on either count, since James, who won a PETA Proggy Award for the animal-friendly film Avatar, said he planned to grow crops on his 2,500-acre rural New Zealand property, and Leona, a Sexiest Vegetarian alum, won't wear animal skins and unceasingly advocates for animal rights. Of the choice to eat vegan, James said, "It's not a requirement to eat animals, we just choose to do it, so it becomes a moral choice and one that is having a huge impact on the planet, using up resources and destroying the biosphere."

A very eloquent case for vegan eating, indeed.

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Adoption advocate Lance Bass spoke about his healthy eating convictions as well, saying of veganism that he is "getting close." He said the work he has been doing planting gardens with schoolchildren has inspired him: "I was eating way too much more protein and not enough veggies, and now I've completely changed that in my diet. … It's amazing, and I feel so much better, completely much better."

PETA UK's disturbing new undercover footage of foie gras farms is enough to make anyone go vegan. Celebrities were fired up on Twitter about British retailer Fortnum & Mason's cruel sale of foie gras and about other animal issues:

While these celebs rocked Twitter, another animal advocate was getting a rocking honor: Joan Jett and the Blackhearts were nominated for induction into the Rock and Roll Hall of Fame, and for the first time, voting is open to the public. Cast your vote for Joan, who never misses an opportunity to raise her powerful voice against cruelty to animals.

To keep up with what all the stars are doing for animals, follow @PETA on Twitter. 

Just two months after telling Ellen DeGeneres, "I want to be a vegan," Meredith Vieira has done it. After seeing her Ellen appearance, PETA rushed Meredith a copy of Sir Paul McCartney's slaughterhouse exposé Glass Walls, a vegetarian/vegan starter kit, and Tal Ronnen's The Conscious Cook to help her along. On The Chew, she told chef Mario Batali about why she made the switch: "I've done a lot of stories on the way food is, you know, processed in this country—animals—and it's very disturbing."

CNBC's Jim Cramer isn't just mad about money—now he's gone mad for vegetarian cuisine. In the wake of the "pink slime" debacle, Cramer announced on Squawk on the Street that he is going vegetarian, just like his doctor and his daughter.

There will soon be less to see of Seattle Seahawk Deuce Lutui. He went vegan to lose weight and improve his performance in the coming season.

Sexiest Vegetarian alum Leona Lewis finds the song formerly called "Theraflu" by the tool currently called "Kanye West" "awful." She tweeted, "Heard that awful Kanye W song talking about minx dragging on the floor. What an awful thing to be proud of! I take all my love for him back!" She then tweeted a picture of an adorable mink and the words "Lil minx <3."

Leona's celeb pals joined her in sticking up for animals on Twitter this week:

After learning about Walter, a severely abused dog who was starved and then thrown out of the window of a moving car, Ashley Judd is picking up the tab for his medical expenses, visiting him every day, and updating her Twitter followers on his condition. "This never should have happened to Walter, and through his story, we can make sure that it never happens to another animal again," she said.

Rock legend Morrissey wants to help make sure that no more sheep are mutilated in a cruel process called "mulesing." While touring in Japan, Moz reached out to Tokyo-based international clothier Uniqlo and asked the company to stop sourcing wool from Australian farmers who still mules sheep.

To keep up with what the stars are doing for animals, follow @PETA on Twitter.

Who shot J.R.? Currently, TNT is shooting the Dallas patriarch for the reincarnation of the show coming next summer. And Larry Hagman is having a reincarnation of his own off the set: Switching to a vegetarian diet is helping him fight cancer.

Bob Barker and Jorja Fox are waging a fight of their own—for the elephants, tigers, and lions who are forced to spend a lifetime in chains just so that people can have a few minutes of "entertainment." The pair traveled to Washington, D.C., to ask congressional representatives to support the Traveling Exotic Animal Protection Act, which would bar circuses from using wild animals.

The Toronto Maple Leafs' Mike Zigomanis might call himself a lover, not a fighter. The decorated Most Gentlemanly Player takes his thoughtfulness to the kitchen, too, where he whips up amazing vegan smorgasbords that make us nonchefs feel as inferior as his opponents do on the ice.  

The lovely Sasha Grey scored a goal: she just adopted a furry new companion, her rescued dog, MacReady.

You'll find no fur on Placebo drummer Steve Forrest, who stars in a new anti-fur ad for PETA U.K.:

Photo: © Kayla Wren

Fellow fur foe Leona Lewis is launching her own Project Runway of sorts, offering aspiring designers a chance to create an outfit that she will wear on tour and be photographed in. And she has specified that the designers must "make it work" without harming any animals—Leona only wears cruelty-free fashion.

Written by Michelle Sherrow

"Skinnygirl" Bethenny Frankel might be calling us for tips—she is raising baby Bryn on a healthy vegetarian diet. 

Award-winning singer Leona Lewis is also a champ for seals. The longtime vegetarian and fur foe is calling for an end to the seal slaughter in Namibia. But one place that fur was welcome—and, in fact, required—was at a dog fashion show hosted by Kevin Nealon, which raised money for spay-and-neuter clinics.

Many stars have been letting their fingers do the talking, sending pro-animal messages to their millions of Twitter followers:

American Idol veteran Jordin Sparks and her four dogs would probably have enjoyed the show—Sparks makes sure that they get plenty of quality time together. The dogs travel right alongside her on her tour bus, and (get your "Awww!" ready) she says that she strives to be a better person because of them.

Is Elle Fanning thinking about becoming an animal parent too? The Super 8 star was spotted in Santa Monica looking at cats who were up for adoption.

Written by Michelle Sherrow

"When I see people wearing fur, it makes me so sick. Especially when I see young singers doing it—that sickens me."

We suspect that leather-shunning, veggie-lovin' singer Leona Lewis was referring to at least one half of the gruesome twosome that's duking it out in today's installment of "Who Wore It Worse?"

The ditzy divorcée on the left is skinfully hag-tastic, while the one on the right—well, let's call her the "Barbadian Barbarian." (Try saying that one 10 times fast.)

See the faces behind these "Neanderthal Fashion No-No's," and then cast your vote in today's round of PETA's "Worst-Dressed" contest.

Written by Karin Bennett

PETA Europe's "Sexiest Vegetarian," Leona Lewis, proved why she deserved her crown when she rescued a rabbit from a life on the streets—a life that was bound to end on someone's dinner plate.

fashionindie / CC

While out and about in L.A. this week, Leona noticed a homeless man with a tethered rabbit. When she asked the man what his plans for the rabbit were, he admitted that he might eat the bunny. Um … come again?! As a vegetarian and a diehard animal defender, Leona struck a deal with the man: She gave him $100 to buy proper food, and he gave up the rabbit.

Now, Melrose (the rabbit was named after the street he was found on) is living it up in the "Bleeding Love" superstar's posh L.A. pad. Jealous much?

A friend of Ms. Lewis said, "She didn't think life on a lead was any way for a rabbit to live—then when he said he was going to eat it she knew she had to save it." Swoon. If only all celebrities had that kind of "Spirit."

Written by Christine Doré