04/12/2009 05:12 am ET | Updated May 25, 2011

Chris Brown & Rihanna Record "Sweet And Sentimental" Duet

The song's producer, Polow Da Don, tells PEOPLE. "My heart goes out to both Chris and Rihanna for what has happened in the past," says Polow. "They are both great artists to work with, and I wish them well."

To the shock of friends and family, the pair reconciled days before Brown's court appearance and have now spent time together recording a song that, a source tells PEOPLE, is "sweet and sentimental" and "expresses the challenges of a love relationship."

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