The pop star went to a deposition Monday in her dispute with ex-husband Kevin Federline over the custody of their two boys, according to published reports.

Spears drove to the office of Federline's attorney, Mark Vincent Kaplan, with a friend and was seen leaving more than two hours later, People.com and TMZ.com reported.

Calls to Kaplan's office Monday were not answered, and a phone message left with Spears' lawyer, Tara Scott, was not immediately returned.

Spears has had trouble making recent legal dates. On Dec. 12, she called in sick for a court-ordered deposition, then arrived late at Kaplan's office on its rescheduled date, Jan. 3. That night, she was taken to a hospital after a standoff in her home when she refused to return the children to Federline's bodyguard following a visit.

Spears didn't attend a court hearing Jan. 14 in which a court commissioner decided to keep in effect an order suspending her right to visit Jayden James, 1, and Sean Preston, 2.

Spears went to the courthouse briefly but never went inside, and she left amid a swarm of paparazzi.

She will get another chance Feb. 19 to persuade the court to restore her visitation rights.