Want free Beyonce tickets? You'd better be willing to lay off the steak for awhile. Late Wednesday on Instagram, Beyonce announced that she and her husband, the rapper JAY-Z, would offer fans free tickets for life if they're willing to go vegan for a month in support of the Greenprint Project, which encourages people to reduce their environmental footprint by eating plant-based meals. Under the contest rules, each successful fan will get a pair of tickets to one concert per official Beyonce or JAY-Z tour for the next 30 years. Reuters reports that Beyonce has pledged to eat plant-based breakfasts and go meatless on Mondays, while JAY-Z is promising to eat two plant-based meals per day.