What's better than T-shirt time? "No T-shirt" time! And that's exactly what the throng of Jersey Shore fans got outside MTV's Times Square studios when Mike "The Situation" Sorrentino revealed his new PETA ad encouraging everyone to spay and neuter their animals.

Fans who couldn't make the unveiling still got to see Sitch's sweet tweet that revealed his ad and gave some love to PETA. And he wasn't the only one turning Twitter into an animal love-fest this week. Check out what these other celebs were doing to help with PETA campaigns:

Morrissey sings about how "Meat Is Murder," so, of course, he doesn't want any dead bodies around him when he's performing. For his appearance on The Colbert Report, Morrissey insisted that the entire building be meat-free for the day. And when, in true Colbert fashion, Stephen tried to rib Moz about his morals, the PETA pal had some zingers of his own ready. "Animals are nicer than humans," he deadpanned. "If you stick your grandmother in an oven, she will probably be tasty. But is that any reason to eat your grandmother?"

James Cameron might be about to make a titanic impact on the way the world eats. The director and newly minted vegan is challenging environmentalists to adopt a plant-based diet to save the planet. During a recent speech, he told the audience, "I want to challenge everybody here: If you're an environmentalist, I say, my challenge is, you can't be an environmentalist, you can't be an ocean steward, without truly walking the walk, and you can't walk the walk in the world of the future, the world ahead of us, the world of our children, not eating a plant-based diet."

And vegan Emily Deschanel is speaking up once again. Her show, Bones, dedicated another episode to animal rights, this time, to the cruelty of keeping exotic animals as "pets."

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

When PETA's "bovine" campaigner for cow causes got wind of a Missouri Cattlemen's Association convention in Columbia, Missouri, she rounded up some friends and hoofed it to the site. 

The "cow" took to the stage at the coronation of the Beef Queen, then marched across the room with her "Meat Is Murder" sign to ask the attendees to give cows the royal treatment instead—by not slaughtering them for food.  As a cowboy herded the "cow" to the exit, supportive people in the crowd booed her unceremonious removal.

Say "boo" to beef!

Do PETA staff secretly play backup for Morrissey, or did all his bandmates wear our McCruelty shirts?

© Sus Lew

 
Moz and his group's stage wear at their York, U.K., concert was music to chickens' ears. And we're betting that after the audience chowed down on Morrissey's meatless fare and rocked out to "Meat Is Murder," they won't be committing a "drive-through" anytime soon.

To be a flock star like Morrissey, grab your McCruelty tee from the PETA catalog.
 

Written by Michelle Sherrow

Organizers of the Lokerse Feesten music festival in Belgium have assured their headlining act, PETA pal Morrissey, that in his honor, the festival will serve only vegetarian fare on the day of his performance. What, did you expect anything less from the man who did for vegetarian diets what Bret Michaels did for bandanas?
 

 
Instead of burgers and horse-meat sausages (yes, they eat horses in Belgium), organizers said festival food stands will offer "an array of healthy vegetarian dishes."

Perhaps after Morrissey performs "Meat Is Murder," they'll decide to keep it that way.
 

Written by Michelle Sherrow

PETA pal Morrissey isn't shy about telling British Prime Minister David Cameron what he thinks about Cameron's penchant for deer hunting. (Former Smiths bandmate Johnny Marr even publicly "forbade" Cameron from liking their music.) In a recent pre-concert interview, Morrissey told the BBC that he probably wouldn't even open his dressing room door for Cameron, saying, "It's a moral issue. Killing a stag is like killing a child. What's the difference?"
 

 
Perhaps the prime minister should have done some homework before expressing his fondness for The Smiths, whose second album was titled Meat Is Murder. Morrissey is a vegetarian who is outspoken about the Chinese fur trade, the Canadian seal slaughter, and The Queen's Guards' bearskin hats. In 2005 he grabbed PETA's Linda McCartney Memorial Award for reaching out to millions of people with a message of compassion. Maybe he can convince Cameron to be the next to follow in his kind footsteps.
 

Written by Michelle Sherrow 

Meat is murder, and disturbing new facts released last week about the case of convicted British Columbia pig farmer turned serial killer Robert Pickton show just how dead-on the saying is.

The Province reports, "In Pickton's freezer were eight packages of meat both chunked and ground, some wrapped in plastic, some in butcher's paper. These were the last remains of Inga Hall and Cindy Dawn Feliks." The provincial health officer also warned in 2004 that the remains of some of Pickton's victims may have been mixed in with pig flesh sold from his farm.

It should go without saying that no one—whether they have two legs or four—deserves to be tortured, killed, cut up, and eaten, and that's why PETA ran this billboard in Edmonton after the murders:

Girl © Jupiterimages
Pig © The Funny Farm/Getty Images

So … who are you having for dinner? I think I'll stick to food that didn't have a face.

Written by Lindsay Pollard-Post