Known for her hip, girlie take on casual clothes, London-born Charlotte Ronson got her start customizing vintage tees and tanks for her friends. (Who happened to include plenty of trendsetters thanks to her cool family ties: Brother Mark is a sought-after DJ and music producer as is Ronson.s sister Samantha.) When demand increased for her garments, Ronson issued her first collection under the label C. Ronson, which has since become a favorite of the Hollywood set: Lindsay Lohan, Jessica Simpson, Nicole Richie, Mischa Barton, and Jennifer Love Hewitt have all been seen wearing Ronson.s clothes.