The Toxic star is currently locked in a legal battle against her dad to have him permanently removed from her conservatorship, after he was placed in control over her life following her public breakdown in 2008.

In the latest development in the case, Britney's lawyer Samuel Ingham has claimed that "it would be highly detrimental to Britney's interest" to give Jamie any more control over her estate.

The comment comes after Jamie submitted a proposed order to the court, in which he argued that he has lost some of his powers since he and Bessemer Trust became co-conservators of Britney's estate in November.

But Ingham argued that if Jamie had his way, he would have the power to select his own "professional investment advisors" separate from Bessemer Trust.

"It is difficult to imagine a better recipe for conflict between the co-conservators and confusion with both Britney and third parties," he said. "Ultimately, the appointment of Bessemer Trust would be rendered meaningless."

He added that he believes Jamie is trying to ensure that Bessemer will never become the sole conservator of Britney's estate - something the Gimme More star had requested at the beginning of the legal battle.

Ingham wants to revisit the possibility of Bessemer becoming a sole conservator in the future. The next hearing in the case is set for Thursday.