Nadia Comăneci
Romania
Romanian gymnast Nadia Comaneci earned seven perfect 10.0 scores across the 1976 Montreal and 1980 Moscow Olympics. Most famously, her perfect 10 on the uneven bars at the 1976 Montreal Games was the first in Olympic history -- so unprecedented that the scoreboard could not display 10.00 and instead showed 1.00, a moment now legendary in gymnastics lore. She was just 14 at the time and won three gold medals at that Games. Her performances ultimately prompted a complete overhaul of the gymnastics scoring system.