Star mag is reporting that Kevin Federline has been trying to get convince estranged wife Britney Spears to get help for her drinking. "Kevin has tried to convince Britney to check herself into rehab from every possible angle," said a source. "First he tried threatening to take away the kids, then he tried pleading with her to take care of herself... He's afraid she's going to hurt herself." Federline reportedly has Spears's mom Lynne on his side as well, and is concerned the popstar isn't spending enough time with their two children. "They're being raised by strangers," said the source. "He told Britney to get help before it's too late."source