Some are animal rights activists, and others just don’t think it’s natural to eat animal products, but what these Hollywood notables have in common is that they refuse to eat beef, pork, chicken or fish.  From extreme vegans like Ariana Grande and Lea Michele to Carrie Underwood and Natalie Portman, who may indulge in animal products like leather but skip the animals at dinner, these 10 stars are devoted to a meat-free diet.