This is a fantastic feature on Hollywood's hottest new diets – each of which has become big with stars with the help of a little science. Here our writer takes a detail look at the diets that have more than a reason to work other than just being a fad or endorsed by a big star. From the O2 Diet to the Rosedale method, here we look at the hottest ways to beat the bulge, the science behind them, sample menus, exercise regimes, the stars who have tried them and much more.