Bessemer Trust filed the paperwork after a judge denied Britney's request to remove her father as conservator of her estate.
ET's breaking down everything you need to know about the ongoing legal case.
Despite a legal setback, the pop star is keeping positive when it comes to her conservatorship battle, a source tells ET.
ET spoke with the singer about working with Britney on 2016's 'Slumber Party,' her new single, 'Pasadena,' upcoming album and more.
On ET's The Download, Bill Cosby and his accusers react to his prison release, and Dr. Drew and Iggy Azalea rally behind Britney.
The artist, who collaborated with Spears in 2015, said the singer is 'not exaggerating' about her father's behavior.
The news comes a week after Britney spoke out in court.
'She deserves a chance at something different,' Dr. Drew said of the singer in a new interview with ET.
In new court documents obtained by ET, Jamie Spears claims he hasn't been involved in Britney's personal conservatorship since 2019.
Last week, the pop star alleged her father and his team have control over her finances and reproductive decisions.
'Ms. Montgomery looks forward to supporting Britney through that process,' a rep for the conservator shared in a statement to ET.
Jamie Spears claims he's been cut off from communicating with Britney.
On ET's The Download, Christina Aguilera rallies behind Britney Spears in her conservatorship battle, the latest on 'The Bachelorette.'
Christina Aguilera took to Twitter on Monday to support Britney Spears after her conservatorship testimony.