No more champagne for the couple (via Twitter/@Life_and_Style)

This month, America’s favorite couple is becoming vegan. However, Jay Z and Beyonce announced that they’re only doing it for 22 days. 

Jay Z wrote on his blog, Life + Times: "Psychologists have said it takes 21 days to make or break a habit. On the 22nd day, you've found the way. 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! This all began a few months back when a good friend and vegan challenged me to embrace a 'plant-based breakfast' every day. It was surprisingly easier on me than I thought."

The cleanse is more than just cleaning out his body. Jay Z writes: "There's something spiritual to me about it being my 44th birthday and the serendipity behind the number of days in this challenge; 22 (2+2=4) coupled with the fact that the challenge ends on Christmas Day. It just feels right!"

The rapper’s friend Marco is helping the couple through his “22 Days of Nutrition” diet. 

E! News says the star is not sure how his eating habits will evolve after Christmas, but says it depends on the spiritual and physical benefits. 

Other vegan celebs include Mike Tyson, Anne Hathaway, Jessica Chastain, Natalie Portman, Russell Simmons, Betty White, Portia de Rossi, Ellen Degeneres, Woody Harrelson, Bill Clinton, Toby Maguire, Russell Brand, Lea Michele, Usher and many others in Hollywood.

Portman once blogged: "The human cost of factory farming -- both the compromised welfare of slaughterhouse workers and, even more, the environmental effects of the mass production of animals -- is staggering.”

Degeneres and de Rossi are so into the vegan lifestyle that they are opening a restaurant which is supposedly going to be on Ventura Blvd. in the San Fernando Valley. 

Mike Tyson used the diet to cleanse his body of years of drug use: “Becoming a vegan gave me another opportunity to live a healthy life. I was so congested from all the drugs and bad cocaine, I could hardly breathe"

Needless to say, veganism is certainly loved by Hollywood's A-listers. 

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