TMZ has learned Britney Spears plans to go to court tomorrow with her lawyers to ask the judge to expand her visitation rights to overnight visits with her kids. We’re told Spears was urged by her lawyers to attend the hearing, scheduled for 8:30 AM in downtown Los Angeles.

We’ve also learned Spears has now had several clean drug tests. Brit’s lawyers will use the these tests and other evidence to make their case. They’ve told Britney her presence will show the judge how much she cares about the kids– she finally gets it and plans to show.

Currently, Spears has monitored visitation — the kids are deposited in the morning and returned to K-Fed in the early evening.

Oh, by the way, sources say the entire family– Britney, Kevin, Sean Preston and Jayden James– have pink eye. That’s why K-Fed was wearing a K-Patch at the last hearing.

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