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The future stars of action sports

9 of 13

Kelly Sildaru

Photograph By Lorenz Richard/Red Bull

This Tallinn, Estonia, native has been making waves in the freeskiing world for years already -- and she's only 12 years old. By age 10, she was doing switch 900s, landing on the podium at major international slopestyle contests and getting hundreds of thousands of views on her YouTube videos.