Jay Z and Beyoncé Are Going Vegan

NEW YORK, NY - FEBRUARY 12: (EXCLUSIVE COVERAGE) Beyonce and Jay-Z attend the after party following the premiere of the HBO Documentary Film "Beyonce: Life Is But A Dream" at Christie's on February 12, 2013 in New York City. (Photo by Larry Busacca/Getty Images for Parkwood Entertainment) Photo: Larry Busacca/2013 Getty Images

No, really: Jay Z announced it on his website. "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!! This all began a few months back when a good friend and vegan [Editor's note: We see you, Gwyneth] challenged me to embrace a 'plant-based breakfast' everyday [sic]. It was surprisingly easier on me than I thought …"  He will be blogging about his progress, which makes the Jay Z Vegan Challenge your new best Advent calendar of the season. Bonus: "P.S. B is also joining me." What do you think Beyoncé's favorite plant is? Cactus? Fern?