BEIJING - AUGUST 16:  Michael Phelps of the United States celebrates victory in the Men's 100m Butterfly Final held at the National Aquatics Centre during Day 8 of the Beijing 2008 Olympic Games on August 16, 2008 in Beijing, China. By winning gold in the Men's 100m Butterfly Phelps tied Mark Spitz's record of winning seven gold medals in a single Olympic Games. (Photo by Shaun Botterill/Getty Images)