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Olympics Day 1 - Swimming

LONDON, ENGLAND - JULY 28: (L-R) Jessica Hardy and Missy Franklin of the United States support their teammates during the Final of the Women's 4x100m Freestyle Relay on Day One of the London 2012 Olympic Games at the Aquatics Centre on July 28, 2012 in London, England. (Photo by Al Bello/Getty Images)

Swimming phenom Missy Franklin

Missy Franklin's four gold medals in London haven't changed her personality one bit – she's still a happy-go-lucky teen.