Don't bring those cheeseburgers anywhere near Beyonce and Jay Z -- at least not until Christmas.
The couple has announced they'll be eating vegan from December 3-25 as part of the 22 Days Challenge, a cleanse supported by Jay Z's exercise physiologist and friend Marco Borges.
Jay Z writes on his blog that he calls the diet "plant-based" rather than vegan and started with breakfasts.
"It was surprisingly easier on me than I thought," he adds. "You can call it a spiritual and physical cleanse. I will post my progress. Any professional vegans out there that have any great food spots, please help out! 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..."
The move comes as Jay Z is set to kick off a North American tour on Friday, December 6, in Anaheim, Calif., that wraps January 31 in University Park, Pa.