20 Incredibly Hot Mistresses of Celebrities

13. Britney Spears – Kevin Federline

This one is a bit hard to explain. Kevin Federline was just a backup dancer and really only became a celebrity because his mistress was one. Kevin Federline was in a long-term relationship with the mother of his child, who was pregnant with their second child when he decided Britney Spears was a much better option. His relationship with Britney was all over Hollywood, and when things got crazy, Kevin Federline might just have regretted his decision to shack up with the superstar.