Producer Quincy Jones said putting together a lineup of performers and presenters for his upcoming benefit concert in Rome was "like trying to saddle a rat."

Norah Jones, Alicia Keys, Andrea Bocelli, Muhammad Ali, Angelina Jolie and Oprah Winfrey are among those expected to participate in the We Are the Future concert Sunday. The four-hour event will raise money for child centers in Ethiopia, Eritrea, Sierra Leone, Afghanistan, Rwanda and the West Bank.

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The concert will take place at the ancient Roman chariot track Circus Maximus. It will air live on MTV in Italy, and a shorter version will be broadcast later in other MTV markets.

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