Eyes are kind of useful, if you hadn't already noticed. They can pull off this nifty trick of converting light into neural electricity, which is handy for avoiding walls and admiring crushes. But eyes are not only meant for seeing: they are meant to be seen. For thousands of years, we have used eye shadow to highlight the inherent beauty of our cute little peepers, and the tradition is still going strong today. Check out our slideshow of celebrities sporting all varieties of eye makeup! We promise you at least one Lady Gaga.