Happy Birthday, Kim Yu-na! The South Korean figure skater, known as Queen Yu-na, celebrates her 23rd birthday today. As the heavy favorite at the 2010 Olympics in Vancouver, the 19-year-old won the gold medal with a performance that likely will be remembered as one of the best of all time. Her score of 228.56 points broke the world record by more than 18 points. Her margin of victory over silver medalist Mao Asada of Japan was more than 23 points. With the gold, Kim became the first skater from South Korea to medal in any discipline of figure skating at the Olympic Games. Back in March, Kim returned to the world figure skating championships for the first time in two years and won by more than 20 points. She is planning to defend her Olympic title next year in Sochi.