Hottest Winter Fashions

From New York to L.A., see what trends PEOPLE style director Susan Kaufman calls the must-haves for the season. By Serena Kappes

TREND: KNIT CAP

Want to stay toasty and still look cool? Throw on a knit cap, Kaufman says. Here, Beyoncé (left) goes for whimsy with a fur pom-pom while Keira Knightley puts function first.