Federline Concerned About Britney Spears
Canceled partying in Las Vegas to watch his kids, while Britney went out shaving heads.

During Britney Spears's recent wild weekend, Kevin Federline, canceled plans to party in Las Vegas during the NBA All-Star weekend in order to stay in Los Angeles to be available for the couple's children, sources tell PEOPLE.

"Kevin is very worried about the mother of his two sons'," says a close pal of Federline's. "He loves her. He will always love her – even after their divorce."

It's not clear if Federline's been in direct contact with Britney or his sons' about recent events, but after Britney's escapade she's checked herself into rehab yesterday (20Feb.07).
Source: people