Actress Jaime King stepped out for a cocktail party sporting an American Apparel headband that made us do a double take. She wore the velvety blue accessory atop a looped bun, adding a level of sophistication to an otherwise casual look. Her gorgeous style is supereasy to pull off. Just add a dime-size dollop of mousse like Tigi Catwalk Strong Mousse ($12) to your hands and slick it through your strands before you style. This will help keep the headband and your hair in place. Then just pull your hair into a mussed-up bun and slide on your hair accessory, and you've got a casual Winter look. Shop some sweet headbands below!