The movement supported by the singer’s huge fanbase aims to put an end to her dad’s control over her finances, business and personal life.
In 2007, Britney had a breakdown after splitting from her ex-husband, Kevin Federline.
The star went on to lose custody of her sons Jayden, 14, and Sean, 15, and was detained for 14 days for her own safety.
Britney was then placed under the conservatorship, which prevents her from driving, going out alone or making her own financial decisions.
The Battle for Britney: Fans, Cash and a Conservatorship is on BBC iPlayer now and will be on BBC Two on Wednesday at 9pm.