3. Tom Cruise and Sven Goran Eriksson
As for Sven: The former England coach left his girlfriend Nancy Dell'Olio when he told her she was "no longer part of my future plans". According to the News of the World Eriksson announced to her privately: "I've chosen a different road in life from yours".
The reasoning behind his decision was that he did not see Dell'Olio for three weeks, during which he spent some quality time with a young female. But wasn't the first time Sven cheated on his girlfriend. It happened twice in the past: once with TV star Ulrika Johnsson and once with the FA secretary Faria Alam.
As for Tom: Apparently he is a bit of a relationship addict? He told Jamie Foxx the reason why he got engaged to Katie Holmes so soon after splitting from Penelope Cruz. He said: "I don't like not being in a relationship."