Shar Jackson, Kevin Federline and Britney Spears
Perhaps one of the most controversial and well-talked-about celebrity love triangles was that of Shar Jackson, Kevin Federline and Britney Spears. During the early 00s, actress Shar Jackson was engaged to dancer Kevin Federline and had even started a family with him. But around the same time that she became pregnant with their second child, Kevin began an affair with his boss, pop icon Britney Spears. Before long, Kevin split from Shar and began a whirlwind Hollywood romance with Britney that included two kids and a nasty divorce and custody battle.