LOS ANGELES, California (X17online) - The jury deciding whether pop star Britney Spears is guilty of driving without a valid California driver's license is deadlocked.

"I understand that you cannot come to a unanimous decision," the judge said. He then instructed the jurors to resume deliberation.

Earlier in the day, jurors sent several notes to the judge asking for clarification.

The first note asked if the charges were that Spears did not have a valid driver's license or if she did not have a valid California license.

The second note asked the judge for the reason Spears was stopped (by the police) in the first place. The judge declined to answer the question saying it was irrelevant to the case.

Spears hasn't appeared in court and didn't testify during the trial.

Prosecutors allege Spears was obligated to obtain a California driver's license, but her attorney claims Spears' primary residence is in Louisiana and she was properly licensed by that state.