Britney Spears' life under her dad's conservatorship is like "prison," a lawyer for her former manager, Sam Lutfi, charged today in a hearing at L.A. Superior Court.

John Anderson testified he was contacted by another lawyer, John Eardley, to represent Britney in her fight against the conservatorship (which gives Jamie Spears control over her personal and financial affairs). He also says Jamie's control is causing the singer "emotional distress [that is ongoing] now."

Look back at Britney's crazier times.

But Jamie's lawyer Blair Berk argued that Britney repeatedly told her she did not want Eardley "to have anything to do with her."

Berk also called Lutfi an "alleged extortionist" after Lutfi threatened to release "unflattering information" about Jamie if she didn't "do something to stop it." (She called the police.)

See photos of stars at court.

Berk also discussed the voicemail that has surfaced online in which a woman reported to be Britney asks for help getting out of her father's control. The lawyer said the tape sounded as if it had been edited, and says she does not believe it is Britney.

Lutfi's sister Christina testified that, while sharing a cell phone with her brother, Britney called because "she wanted [Lutfi] to get her a new lawyer. She was afraid of her father and wanted a way to get a prepaid cell phone."

See photos from Britney Spears' Circus concert tour.

Spears' ex boyfriend Adnan Ghalib (who is under a three-year stay away order from Spears) picked up the phone, which Christina gave to Britney in a sauna at the Peninsula Hotel on Jan. 16, Christina said.

Look back at all the guys Britney has dated.

Closing arguments in the ongoing restraining order case against Lutfi and Eardley will be heard on April 21. The judge extended the orders until the next hearing.