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Mikaela Shiffrin, alpine skiing (United States)
With Lindsey Vonn out of the Olympics, the 18-year-old is the heir apparent to her ski queen throne. Shiffrin has dominated the slalom circuit since her World Cup debut in 2011, when, at 16, she became the youngest American to win an alpine title. The reigning slalom world champion, she has won seven World Cup crowns and the season World Cup title in 2013.