Pop princess Britney Spears has been questioned in court over her ongoing child custody battle.

Spears, 26, and her ex-husband Kevin Federline appeared before Commissioner Scott Gordon, who took the one-hour proceeding behind closed doors.

The outcome was an unspecified change in visitation status.

Court spokesman Allan Parachini stressed afterwards that the answers given by Spears and parenting coach Lisa Hacker were not considered testimony.

Federline was given full custody of the couple's two little boys, Sean Preston and Jayden James, earlier this year and Spears' visitation rights were suspended. It followed months of bizarre behaviour by the singer and two hospitalisations.

But Spears has appeared stable recently, and her visitation rights have been gradually restored.

She remains under the conservatorship of her father, James, who, along with an attorney, also controls of his daughter's financial affairs.

A status conference in the custody case is set for July 15.

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