Stella McCartney's Fall/Winter 2012 beauty look was all about the eyes: the British designer enlisted MAC Cosmetics to create the striking beauty look that instantly started a new makeup trend. The models wore an electric blue mascara, piled on to both upper and lower lashes. The rest of their makeup was kept simple - a natural foundation, a nude lip and sculpted eyebrows. Models looked Twiggy-esque with beautiful open eyes that really stood out. Paired with a sea of stunning blue creations, this was one beauty move that will definitely become a must-do, and it's really simple to achieve too, just pile on the your favourite blue shade and go all doe-eyed.