Britney Spears has been declared a minor since 2008 after a period of mental illness.
She has lived with her father as a formal guardian, something that led to a big movement under the hashtag #FreeBritney.
In the documentary, journalists have dug deeper into the legal tours where the artist fought against guardianship, which means that her father was given a legal right to control her assets.
For the first time, people in the vicinity of Britney Spears are also speaking out.
Among others, a lifelong friend who traveled with Britney for most of her career, a PR manager who initially created the artist's image, a lawyer who is currently working on the guardianship case and the first lawyer Britney hired with the hope of contesting the guardianship.
The documentary is streamed on American Hulu.