© @Copyright HELLO! Hello! Magazine may have killer abs, but she's made it clear her diet is all about eating foods in moderation.The Voice star, 51, is believed to follow a vegetarian or vegan diet containing lots of healthy fruits and vegetables, but she never denies herself a daily treat – or the odd nine pizzas!Speaking of her diet and fitness secrets, she told back in 2012: "There is no secret: You just have to eat healthily, work out, and torture yourself!" What does Gwen eat at home