Britney Spears‘ lawyer has filed new legal documents requesting a judge boost a court hearing around her controversial conservatorship.It comes after the singer was recently given permission to hire her own lawyer, Matthew Rosengart, who has since filed paperwork to remove her father Jamie Spears from the conservatorship which has been operating since 2008.The next hearing in the long-running case is set to take place on September 29, but Rosengart has now requested that the court move it to 23