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R. Kelly has been locked in a nasty divorce battle for the last decade with his ex-wife, who at one point was receiving more than $30,000 a month as part of their settlement, according to a new report.

The disgraced R&B star — now facing numerous sexual abuse charges in multiple jurisdictions — has been warring with Andrea Kelly ever since their divorce was finalized in 2009, the Chicago Sun-Times reported.

Details of Kelly’s financials were among court documents unsealed Monday and obtained by the outlet.

Kelly was ordered to pay Andrea, the mother of his three children, more than $30,000 a month, which included a $10,000 “maintenance” payment that was supposed to remain in effect until January 2019.

The “maintenance” payment was nixed when Andrea got remarried in 2013 — and Kelly, whose real name is Robert Kelly, begged to get the payments reduced, noting his struggling career.

“Robert has seen a steady decline in his popularity, album sales, number of scheduled performances, and ultimately, as a consequence of the foregoing, his income,” his lawyers wrote in a filing.

But Andrea fought back in 2014, accusing her ex of hiding his money and filing subpoenas for his royalty payments and tax records in a bid to figure out his net worth.

“Robert has gone to great extents to shelter his income and assets and, upon information and belief, to place certain income and assets in the names of others,” Andrea’s lawyers wrote in court documents.

Kelly’s lawyers responded saying the “I Believe I Can Fly” singer has a “tax liability of over $7 million.”

In 2013, the singer had paid $113,000 to settle a back child support payment, the Sun-Times said. By then, he had also paid his ex-wife $1.48 million.

Kelly is due in Chicago federal court Tuesday afternoon for arraignment on a 13-count indictment charging him with child pornography, enticement of a minor and obstruction of justice.

He also faces federal charges in Brooklyn for allegedly sexually exploiting at least five girls and women — as well as sexual abuse charges brought by Illinois prosecutors.