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She’s as famous for her ever-changing looks as she is for being a workaholic singer, actress, and all-around superstar. Here, some of her secrets to staying fierceBy April Long June 14, 2010 1:00 p.m.Photo: Michael ThompsonBeyoncé’s Hairstyles and Makeup Through the YearsThe last rays of afternoon sun are streaming through the window of a Manhattan loft where Beyoncé Knowles sits resplendent in