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Prosecutors charged R&B singer R. Kelly on Thursday with 11 new sex-related counts involving one of the women who accused him of sexually abusing her when she was underage, including counts that carry a maximum sentence of 30 years in prison, making them the most serious he faces.

Cook County prosecutors charged the Grammy award-winning singer with four counts of aggravated criminal sexual assault, two counts of criminal sexual assault by force, two counts of aggravated criminal sexual abuse and three counts of aggravated criminal sexual abuse against a victim who was at least age 13 and under 17 at the time.

The four aggravated criminal sexual assault counts carry maximum terms of 30 years in prison. Kelly is due in court to hear the new charges next Thursday.

Kelly was already facing 10 counts of aggravated sexual abuse involving four women over roughly a 10-year period that started in the late 1990s. Three of the women were minors when the alleged abuse occurred.

The new charges pertain to a single victim, identified in the court filing by the initials “J.P.” Prosecutors didn’t specify in the filing if she is the same person as one of the original four accusers who was also identified as “J.P.”

R. Kelly’s lawyer, Steve Greenberg, told The Associated Press the 11 sex-related counts “are not really new.”

“They are the same conduct, just charged differently,” Greenberg said. “Same alleged victim, same timeframe, same facts.”

Greenberg has long said Kelly expected to prevail at trial and in his comments Thursday, he said he expects the “same results.”

Kelly pleaded not guilty to the original charges and denied any wrongdoing after his February arrest. He has been free since Feb. 25, when a suburban Chicago woman posted $100,000 bond, or 10% of the $1 million bond the judge set in his case.