Everybody's going vegan! Superstar couple Beyonce and Jay Z have revealed they are collabing on an entirely new project -- pledging to take part of a new "plant-based" vegan diet for the next three weeks together. And the duo was kicking off their plan, which started yesterday, on the right foot! On Tuesday afternoon the A-listers lunched at vegan restaurant Real Food Daily in West Hollywood. Despite their superstar status, Blue Ivy's 'rents managed to fly relatively under the radar when they left the trendy vegan eatery.

"On December 3rd, 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 Z wrote on his website, Life + Times. "This all began a few months back when a good friend and vegan challenged me to embrace a 'plant-based breakfast' everyday. It was surprisingly easier on me than I thought..."

The 44-year-old wrote rapper also wrote that his lady love would be committing to the food challenge, adding, "P.S. B is also joining me."

The friend that the "Young Forever" singer is referring to is Marco Borges, who is an exercise physiologist and also the founder of 22 Days Nutrition, a vegan, organic, and gluten-free food and lifestyle company.

Jay also explained the significance of doing this challenge for this 44th birthday:
    "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!"

As for whether or not Jay and Bey are going vegan for good? "I don't know what happens after Christmas. A semi-vegan, a full plant-based diet? Or just a spiritual and physical challenge? We'll see...Best of luck and health!"

Have fun with that guys, we will be busy eating fists full of meat this holiday season. Yum, yum good!