Britney Spears' father Jamie's conservatorship has been extended until December 31.

Jamie - who was given legal authority of Britney's finances and affairs on February 1 after her public meltdown in January - will continue to control Britney's estate until the end of the year.

However, a progress review for the case has been set for October 28.

A source said: "The extension of the conservatorship was at the request and suggestion of Britney's doctors. They've indicated she's made great improvement, but it's a work in progress. Jamie Spears doesn't want the conservatorship to last a day longer than the doctors recommend."

It was recently revealed Britney has spent nearly $2.5 million on attorney fees in the last year alone.

The 26-year-old star has paid the staggering amount on battling ex-husband Kevin Federline for custody of the couple's two children, Sean Preston, two, and Jayden James, 10 months, and paying Jamie for being her conservator.

Since he took charge of the singer's life, Jamie has reportedly received $37,500.

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