Boris Johnson's former adviser has emerged as a voice of support for the embattled singer
Filed by Spears' new lawyer Mathew Rosengart, the petition requests a certified public accountant be appointed in Jamie's place
The former NSYNC star made the revelation during a discussion about Britney's conservatorship battle
Spears recently said she had no plans to perform while her father Jamie remained her conservator
A proposed new law would allow Spears to request a change of conservator without needing to prove abuse or fraud
"All I have to be is just grateful that I happened to have a good group of people around me"
"I'm not gonna be performing on any stages anytime soon with my dad handling what I wear, say, do, or think"
She appears to take aim at family members
The pop singer was also allowed to hire her own lawyer, in the wake of her court-appointed representation resigning earlier this month
The battle over Spears' conservatorship will continue today in a hearing in Los Angeles superior court