Coloured aviators giving you flashbacks of *NSYNC circa 1999? Take a deep breath and let's try again. Coloured aviators are back and trending hard - worn by Cara Delevigne and Blake Lively to the coolest US and European festivals, coloured lenses are at the top every street-style bloggers wish list this season. Shop styles by Express, Rayban and Colors In Optics for the best looks going and pick a colour as daring as you are. As long as the sun is shining, you need a pair of these.