Spears's post comes in the wake of a bombshell documentary by the New York Times about the life and career of the pop star.
The documentary, titled Framing Britney Spears, was released over the weekend and has led many celebrities - including Sarah Jessica Parker, Bette Midler and Khloe Kardashian - to voice their support for Britney and the #FreeBritney movement, which calls for Britney Spears to be freed from her father's legal conservatorship.
Britney's father, Jamie Spears, has legal control of her affairs, having been assigned conservatorship when the star experienced her highly public breakdown in 2008.
She is currently locked in a legal battle against her father, Jamie Spears, to have him permanently removed from her conservatorship, as she no longer wants him to have control over her life.
The control extends beyond the singer herself, according to a revealing Instagram story posted by her boyfriend, Sam Asghari.
He wrote on his stories, "Now it's important for people to understand that I have zero respect for someone trying to control our relationship and constantly throwing obstacles our way.
"In my opinion Jamie is a total d**k. I won't be going into details because I've always respected our privacy but at the same time I didn't come to this country to not be able to express my opinion and freedom."
At a court hearing last year, Britney Spear's lawyer, Samuel D Ingham III, claimed Spears had become afraid of her father and wanted him removed for her conservatorship entirely after he allegedly hired a new manager without consulting her.
She continues to fight to have her dad removed from it, but a decision by the courts in December leaves it in place until September 2021.
