PEOPLE Style Awards

Angelina, Beyonce, Jessica – style director Susan Kaufman reveals her annual list of fashion's biggest stars. By Serena Kappes

MOST IMPROVED FEMALE: ASHLEE SIMPSON

About to turn 21, "Ashlee Simpson is shedding her kitschy rock-girl look with the jet-black hair, funky accessories and '80s feeling and is wearing elegant clothes," says Kaufman. Her teenybopper image (left, in 2004) has been replaced by a more mature look (right, in Giambattista Valli at the MTV VMAs). "She's coming into her own as a woman."