Sunglasses. Shades. Frames. Sunnies. Stunna Shades. Whatever you call them, you can't deny that sunglasses are a multitasking essential: they protect your eyes from UV rays, make outdoor activities easier and add some mystery and flair to any outfit. The many styles of sunglasses provide instant updates to your look: aviators have an air of cool-girl sexiness while cat-eye shapes lend retro glamour; classic Wayfarer frames have timeless appeal and oversized round-frame dark lenses say "movie star." Go for thin wire rims or opt for modern colorful frames; play with shapes, lens shade and overall look. Then get ready for people to ask, "Who's that girl?" when you pass.