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Jay Z and Beyoncé - For the next 22 days, Mr. and Mrs. Carter are joining the club of vegan celebrities. The rapper-mogul made a major dietary decision to give up eating foods made with animal products. “On December 3, one day before my 44th birthday, I will embark on a 22 Days challenge to go completely vegan, or as I prefer to call it, plant-based!,” Jay announces on his Life+Times website. “PS: B is also joining me.” But Bey and Jay are not alone—check out all of our favorite celeb vegans. By Metanoya Z. Webb (Photo: Win McNamee/Getty Images)

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Erykah Badu - The star has followed a strict vegan diet since the release of her first album, Baduizm in 1997. According to the singer, this plant-based nutritional lifestyle helps keep her centered. (Photo: Kevin Mazur/BET/Getty Images for BET)

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Tia Mowry - When the actress was diagnosed with endometriosis in her late twenties, a condition that affects fertility, her doctor urged her to adopt a strict plant-based diet. After one year of practicing vegan eating, Mowry became pregnant with her son Cree.  (Photo: Jason Merritt/Getty Images)

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Persia White - The Girlfriends actress, who is a vegan, is a human and animal rights advocate and environmentalist. “The more I learned about the beauty of a plant-based diet, the more my mind and heart opened up. What you eat not only improves your health—it benefits the entire planet,” she said.(Photo by Frazer Harrison/Getty Images)

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Russell Simmons - After turning to veganism, Simmons opened up to fellow vegan, Ellen Degeneres, in an open letter that he hoped would encourage others to adopt the same healthy lifestyle. (Photo by Mike Coppola/Getty Images)

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Mike Tyson - The former pro boxer traded in chomping ears for a meatless diet that helped him shed 100 lbs and cleanse his body from years of abusing drugs.  (Photo: Ethan Miller/Getty Images)

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Leona Lewis - She's been a vegetarian forever, but publicly went full on vegan in 2012. Lewis is outspoken on animal rights issues and refused to be associated with a store that sold animal fur, prompting PETA to name her “Sexiest Vegetarian” in 2009.(Photo: Ben A. Pruchnie/Getty Images)

Photo By Photo: Ben A. Pruchnie/Getty Images

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Vanessa Williams - We think it’s fair to attribute the actress' good looks to vegan eating. The 50-year-old former fashion model is aging gracefully. (Photo: Michael Loccisano/Getty Images)

Photo By Photo: Michael Loccisano/Getty Images

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Usher - After his father died of a heart attack in 2008, the singer-songwriter was determined to take charge of his health and embraced a vegan diet in 2012.(Photo by Kevin Winter/Getty Images)

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Andre 3000 - After Outkast’s first album, Andre 3000, 22 at the time, quit smoking weed and drinking and fell into a vegan/vegetarian diet. He’s been eating healthy ever since.    (Photo: Michael Buckner/Getty Images for Moet Hennessy USA)