Britney Spears‘ battle to remove dad Jamie Spears as conservator of her estate is being backed by her personal conservator, Jodi Montgomery, and her medical team. In court documents filed on July 26 by Britney’s new lawyer Mathew Rosengart, Jodi issued a written declaration in which she supported the 39-year-old singer’s wishes to replace Jamie, 69, with Jason Rubin, a certified public accountant.