Zimbio, in photo: Stavros Niarchos, girlfriend Mary-Kate Olsen
1. Stavros Niarchos dated Mary-Kate Olsen
April 2005 - October 2005

The two date for six months, before Niarchos -- a Greek shipping heir -- abruptly leaves Olson for Paris Hilton. "I miss him and I love him and I don't speak with him anymore. It's a hurtful and painful subject. . . This is a hard time for me," said Olson in an interview with 'W' magazine.