Kevin Federline is hurt that his famous ex-wife regrets their marriage.

In her new MTV documentary, Britney: For The Record, pop singer Britney Spears refers to her two year union with the former backup dancer as “a mistake.”

“Instead of following my heart…I just did it for the idea of everything,” the star is heard saying.

Friends say Federline is taken aback that Britney “felt the need to tell people that she viewed their marriage as a mistake,” confidante of Kevin’s has revealed to In Touch Weekly.

Kevin is also miffed his former flame implied that the couples two sons were mistakes as well.

“How will that make the boys feel when they’re older. Kevin thinks it’s pathetic and hurtful for no reason.”