Supermodel Elle Macpherson turns 51 today! After landing 6 Sports Illustrated covers, the stunning Aussie trademarked, The Body, a nickname giving to her by Time magazine. As a businesswoman, Macpherson took note of the phrase and has launched workout videos, beauty products, and a lingerie line: The Body by Elle Macpherson. Taking advantage of her high profile career, Sydney's girl next door is an ambassador for RED, UNICEF, and the Smile Foundation. In honor of Elle Macpherson's birthday, take a trip down memory lane with a look back at the original supermodels, like Linda Evangelista and Christy Turlington.