Britney Spears is fuming over claims that her ex-husband is dating a hot, blonde Volleyball player, according to U.S. reports.

The former troubled star is supposedly furious that K-Fed is dating again - eventhough Britney herself is said to be dating Bollywood dance instructor Sandip Soparrkar.

A source tells the National Enquirer magazine, "Britney is furious with Kevin.

"They were seeing a counselor with the idea of getting back together. When she recently returned from concert performances in Japan, she learned he'd been out with a new blonde.

"Britney asked Kevin why he is seeing this woman. Kevin just shrugged it off, saying he is not married and free to do what he wants."

Britney has also allegedly asked Keving to join her on her upcoming world tour so they can get back on good terms - after a bitter divorce and custody battle last year.

See Britney's men below