February 27, 2018 - Emma McIntyre/Getty Images North America more pics like this »
Chloe Kim
Chloe Kim won gold at the PyeongChang Olympics, where at 17, she showed girls everywhere that they could succeed in sports just as well as any of their male counterparts. But the wild thing was, the Olympics weren't Kim's debut.

She was already considered to be one of the best snowboarders in America back when she was only 13 years old, when she qualified for the Sochi Games but was more than two years too young to qualify for the Olympics’ minimum age requirement.