Melting hearts of women all over the world, Michael Phelps is one of the most successful Olympians ever. The 27-year-old has an incredible 16 Olympic medals—six gold and two bronze at Athens in 2004, and eight gold at Beijing in 2008.
The best part? This hottie also has a heart of gold! After the 2008 Olympics, Phelps used his $1 million Speedo bonus to set up the Michael Phelps Foundation, which focuses on growing the sport of swimming and promoting healthier lifestyles. Gotta love an amazing, dedicated athlete who gives back too.