The rapper made the announcement Monday at Madison Square Garden. He was joined by Gov. David Paterson, Fire Commissioner Nicholas Scoppetta and Manhattan Borough President Scott Stringer.
The charity concert, billed "Answer the Call," will benefit families of New York City police and firefighters killed on 9/11. It will be held on Sept. 11 at Madison Square Garden.
All proceeds from ticket and concert merchandise sales will go to the New York Police and Fire Widows' and Children's Benefit Fund.
Jay-Z is the former president of Def Jam Recordings.
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