Here's some food for thought: birthday boy Jay Z and his wife, Beyoncé, have decided to go vegan for a full 22 days. From now until Christmas, the music moguls will embrace a plant-based diet inspired by Marco Borges and his 22-day nutrition plan. But this isn't the first time Hollywood has gone vegan. Back in 2011, Oprah took a one-week challenge, not to mention the wide array of celebrities who have embraced veganism for good. In fact, eating one vegan meal a day can even help you lose weight! With all this hype, have you ever tried a vegan diet? Let us know in the poll below!