10 Most Stylish Stars

From the always chic Nicole Richie to the much improved Ashlee Simpson – check out the top fashion icons of 2005, as selected by PEOPLE style expert Susan Kaufman. By Emily Fromm

NICOLE RICHIE

From sidekick to superstar, Richie perfected casual glam (left, in Miss Sixty jeans and a Curve camisole) and red-carpet radiance (in vintage Azzaro, center, and Moschino Couture). "She's had a mega year, stylewise," says PEOPLE fashion director Susan Kaufman. "She favors vintage, and sometimes she creates a '70s character out of her look. Girls everywhere copy her."