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She might just be the most successful athlete you've never heard of! New Zealand's Valerie Adams has won Olympic and World Championship gold. Now she has been named the 2014 female athlete of the year. Hear why she鈥檒l never forget where she was during the opening ceremony of the Sydney Olympics. She was spending one last night with her mother before she passed away. She vowed that day to win Olympic gold in her memory.

Photo: Valerie Adams (CREDIT: Hannah Peters/Getty Images)