Before Spears addressed the court, Mr Rosengart had argued why she should be allowed to choose her own lawyer and said the star’s “powerful, compelling, honest” testimony from the June hearing proves she is “more than capable of hiring her own counsel”.

After the hearing, Spears posted on social media that she felt “gratitude and blessed”.

Alongside a video of her riding horseback and performing cartwheels, she wrote: “Coming along, folks… coming along!!!!! New with real representation today… I feel GRATITUDE and BLESSED!!!!

“Thank you to my fans who are supporting me… You have no idea what it means to me be supported by such awesome fans !!!! God bless you all!!!!!”

It comes following Spears’ explosive first testimony in open court in June, during which she got to have her say publicly for the first time.

At that hearing, the star told the court it was her “wish and dream for all of this to end”, and claimed she wants to be able to get married and have a baby, but that the conservatorship won’t allow it.

Much has happened in the three weeks since Spears’ first testimony, with the star’s long-term manager Larry Rudolph reportedly resigning and the Bessemer Trust, a financial management company that was hired in 2020 to oversee Spears’s estate alongside her father, also pulled out of the arrangement, saying there had been “changed circumstances”.

At the height of her fame, Spears was one of the biggest pop stars in the world, famous for hits including …Baby One More Time, Oops!… I Did It Again, I’m A Slave 4 U, Toxic and Womanizer.

She has been under the control of the conservatorship since 2008, when it was initially put in place as a temporary measure following her high-profile reported breakdown. But since then, she has released four albums and held a multimillion-dollar residency in Las Vegas; raising the question of whether she is really unfit to make her own decisions.

In court, the star was highly critical of her father and said she has “extreme abandonment issues”. Apparently recalling her childhood, she said she was “extremely scared of my dad” and feared he was always going to “show up drunk somewhere and embarrass me”.

Jamie Spears, 69, is a recovering alcoholic.

During her testimony, the judge asked Spears to slow down so the court reporter could take it all down. “I’m here to press charges,” Spears said. “I’m angry and I will go there.”

Spears, who last appeared on stage for a lucrative Las Vegas residency in 2018, has previously said she will not return to performing while her father remains in control.

Speaking outside court, #FreeBritney supporter Derrin Stull, 25, said that now Spears has had her say publicly and there is “visibility”, action has to be taken.

“Well, I think Britney is just such a light in the world, she’s done so much for society, for music as a person, and it’s really sad that she was allowed to live in this type of situation for 13 years. So I think it’s really important that everyone support her.

“Now that there’s the visibility, there’s no excuse. So that’s really of the utmost importance that we just make sure that everyone knows that this is happening, that this is going on and it’s not right.”

Fellow supporter Christina Goswick, 40, said: “Like she said [at the previous hearing], I believe she’s traumatised. She can’t sleep. If you look at her, she looks tired. She just wants her life back and I understand that completely.”