Why did Brittney Spears sign a contract with her father?

A conservatorship was established for American singer Britney Spears by Judge Reva Goetz, placing her father, James "Jamie" Spears, and attorney Andrew M. Wallet, as conservators. The management of the conservatorship by Jamie, Wallet, and Spears's former business manager Lou M. Taylor, among other parties, generated controversy almost from the beginning. While Spears was held on an involuntary psychiatric hold in early 2008 on alleged mental health concerns, there was initially a temporary conservatorship intended to last only days. It was later extended to months and eventually made permanent, against the objections of Spears herself. Over the course of the conservatorship, a series of alleged abuses came to light, as her conservators and their business partners exerted control over Spears's professional and personal life, often without her input and against her expressed wishes.

No the ratio is not 5 to 7