Britney Spears has been ordered to pay $375,000 of Kevin Federline's legal bills, according to court documents released Monday.

Los Angeles Court Commissioner Scott Gordon called the legal billing "reasonable," in large part because "the actions of [Spears] caused the great majority of litigation."

Last week, the pop star's lawyer, Stacy Phillips, complained that Federline's attorney, Mark Vincent Kaplan, had over-charged Spears, and asked that Federline be ordered to contribute to his own legal bills in the former couple's ongoing custody case.

Citing Federline's tip of $2,000 on a recent $365 dining tab, Phillips contended that Federline could afford to help pay "for the diligent work being done on his behalf." She also criticized Kaplan for raising his hourly fee.

Family courts have the power to order one party to pay for the other's fees, based on income and needs.

Federline had previously declared in court papers made public last year that he had no steady income, while Spears takes in more than $700,000 a month.