Britney Spears arrived two hours late Thursday to give her deposition in her custody battle with Kevin Federline, TMZ.com reported.

Federline's attorney Mark Vincent Kaplan said Spears was almost two hours late for the deposition, so he was only able to ask a few questions before having to end at the scheduled time -- 13 minutes later. He said another deposition has been scheduled.

As for seeking sanctions against Spears, Kaplan told TMZ he hasn't decided yet. But he might, if her behavior caused Federline any undue "hardships."

Click here for the TMZ report and to see video

Spears showed up at Kaplan's offices wearing a fuchsia dress with Christian Louboutin shoes.

TMZ reported that Spears' deposition in her custody battle was originally scheduled for Wednesday and she didn't show up ... again. Last month, Britney claimed she was too ill to testify, yet TMZ caught her out partying that same night.

The law firm Trope and Trope asked a court Wednesday to be relieved as Spears' attorneys. The firm said there has been a "breakdown" in communication with the pop princess that makes representing her "impossible," according to the filing, obtained by CelebTV.com.

Sources told TMZ the fact that she didn't show for the deposition Wednesday was a factor in her lawyers' decision to file papers asking to withdraw as counsel, but it was only one of many reasons. As one source told TMZ, "Her whole life has become insane and it's impossible for anyone to get through to her."

Spears and Federline have been wrangling for months over custody of their sons, 2-year-old Sean Preston and 1-year-old Jayden James.

Federline has temporary custody because Spears, who has limited visitation rights, has defied court orders. The two were married in October 2004 and finalized their divorce in July.

On a separate legal front, an attorney for Spears wants the city attorney's office to prove that the pop star is a permanent California resident and is subject to state laws that require her to have a valid California driver's license.

Spears faces up to a year of probation if convicted in a misdemeanor case of driving without a valid license, a charge to which she has pleaded not guilty. The case stems from a videotaped fender-bender in a parking lot in August. A hit-and-run charge has been dismissed.

Spears attorney J. Michael Flanagan earlier Wednesday requested that prosecutors be required to demonstrate that Spears, who owns homes in Louisiana and Florida, intends to make Los Angeles her permanent legal home.

"If they can establish that Britney is domiciled here in California, that she permanently intends to stay here, then she does have a requirement to get a license," Flanagan said in an interview. "Basically, it's a fix-it ticket."

Flanagan said Spears had a valid Louisiana license at the time of the incident and got a California license six days after the complaint was filed.

A call seeking comment from the city attorney's office was not immediately returned. The next court date is Jan. 25.

The Associated Press contributed to this report.