Britney Spears must attend a court hearing in Los Angeles on Monday (14Jan08) if she wants to continue fighting for custody of her kids with ex-husband Kevin Federline, according to reports. The troubled pop star put her custody battle in jeopardy last week (03Jan08) when she refused to hand back her two sons to Federline following a scheduled visit. Her actions sparked a three-hour stand-off with police outside her Beverly Hills home, and resulted in the singer being hospitalised for two days at L.A.'s Cedars-Sinai Medical Center to undergo a mental evaluation. Following the dramatic incident, Federline was awarded sole legal and physical custody of sons Sean Preston, two, and Jayden James, one, while Spears was handed a temporary restraining order against her ex. But the two parties will face each other in court on Monday, when a judge will decide whether to restore the singer's visitation rights. During the hearing, Commissioner Scott Gordon will hear eyewitness accounts of last Thursday's (03Jan08) events from members of the emergency services, who all attended the scene of the incident. And TMZ.com claims Spears must show her complete co-operation if she wants to salvage her custody case and win back her kids. Meanwhile, Federline's attorney, Mark Vincent Kaplan, made a formal request for a copy of the full police report during a brief hearing on Thursday (10Jan08).