Hairstyle File: Tyra Banks

What can we say about Tyra Banks that hasn't already been said? From her groundbreaking Sports Illustrated Swimsuit Issue cover to her award-winning TV shows, this supermodel-turned-megamogul is the last word in "fierce." Oh, and she's had some of the most fabulous hairstyles we've ever seen. In honor of the fifteenth season of Banks' "Americas Next Top Model," let's take a look back at her most iconic hairdo's.