Britney Spears' dad retains control over the singer's financial and personal matters, a Los Angeles court has ruled.

The court has rejected Britney's latest appeal to overturn the conservatorship awarded to her father, Jamie Spears, in February. Jamie was given control of Brit's private affairs after the troubled pop star was admitted to a Los Angeles hospital for a mental health evaluation.

Jamie has since quit his job as a caterer to oversee his daughter's finances and other matters--a role he shares with court-appointed observer Andrew Wallet.

Jamie's conservatorship appointment was recently extended until July 31. Britney has challenged this, but a California appellate court denied the appeal, saying the motion was not filed correctly from a procedural standpoint.