Mixing retro silhouettes with surfer-inspired flair and brilliantly-hued lenses, mirrored shades are quickly becoming the accessory essential of every A-lister and street style style — as evidenced by Anna Dello Russo and Giovanna Battaglia, below. If you're hesitant, stay with us for a sec: these shades are an investment you don't have to save for a rainy (or rather, sunny) day. Whether your signature style is feminine and flirty, or you're more of a downtown kind of girl, these slick mirrored lenses will instantly lend the cool-girl effect to just anything in your closet — no matter what time of year. Now that's some bang for your buck. Shop our editors' picks to get your hands on the coolest accessories under the sun.