Believe it or not, Beyoncé suffers from shyness and to help give her the confidence she needs before going on stage, she adopts an alter-ego called Sasha Fierce, a diva with bags of attitude. Research has shown that if you think and act like a thin person, you are more likely to eat like one so, the next time you feel despair when you look in the mirror, pretend you're someone else who likes, no, adores the way she looks and we can guarantee your day will be a helluva lot better and healthier too.