If you’re a Beyonce and Jay-Z fan, then as incentives go, this has got to be a fairly big one…Having previously extolled the virtues of vegan diets from health and environmental perspectives, the world famous musicians are now offering fans the chance to win lifetime concert tickets if they go vegan for a month. Whilst not your standard vegetable promotion it’s certainly an eye-catching one that might make even more people Crazy in Love…with veg.