Chris Brown and Rihanna Record a Duet

By Jessica Herndon

03/12/2009 at 05:30 PM EDT

Even with a criminal case pending, Chris Brown and Rihanna are making music together.

Brown, 19, who is charged with two felonies in the alleged beating of Rihanna, recently recorded a duet with her, 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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