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They've evolved to become a unisex style, but aviator shades were traditionally worn by air force pilots -- think Tom Cruise in Top Gun. Even now, these masculine shades still evoke power and confidence.
How to wear them: Try graduated shades (like Victoria Beckam) for a modern touch. If you have a narrow forehead and a strong jawline, "aviator styles with a straight top are a good choice to add width to your forehead and soften the lines of your cheeks and chin," says Kendall Farr, author of The Pocket Stylist.