Chrissy Teigen is bumping around in a bikini! The Cravings author, who is expecting her fourth child with husband, John Legend, took to Instagram to channel her Sports Illustrated days.

Of course you've heard of Naomi Campbell, Cindy Crawford, and Brooke Shields. They were the world's first supermodels, after all. But if you’re wondering how to become a model nowadays, a lot has ...