Brown's lawyer, Brian J. Neary, told Judge Cynthia D. Jackson that Brown, whose real name is Inga Marchand, would be present to contest the two complaints filed by Rasheeda Ellis.
During the three-minute session, the judge granted Neary's request for a probable cause hearing, which was set for Sept. 26.
Outside court, Neary said he would ask for the charges to be dismissed at that time.
Ellis told the judge she does not plan to have a lawyer represent her.
She avoided reporters after court, and a phone number under her name in Jersey City was unlisted.
"Foxy says she's never had a problem with this woman," Neary said. He described Ellis as a former consultant to Brown's management company.
Neary said he does not yet know when and where any incident may have occurred, but said Jersey City police were not involved. Brown lives in New York, he said.
Brown, 26, faces a trial in New York, where she was charged with assaulting two nail salon workers in a fracas over the cost of a manicure in 2004.