Mary J. Blige and Andrea Bocelli perform on 'Oprah'

*R&B star Mary J. Blige and classical artist Andrea Bocelli are set to perform Simon and Garfunkel’s “Bridge Over Troubled Water” at the Grammy Awards Sunday during a special fundraising segment for Haiti relief.

The Recording Academy said Wednesday the duet will be available for download at iTunes.com/Target following the show, with all proceeds going to the American Red Cross to benefit earthquake relief efforts in Haiti.

The two artists last performed together on a broadcast of “The Oprah Winfrey Show,” where they sang “What Child is This.” [Watch below.]

The 52nd annual Grammy Awards will air live Sunday on CBS from the Staples Center in Los Angeles. Other artists on the bill include the Black Eyed Peas, Taylor Swift, the Dave Matthews Band and a rumored performance of “Video Phone” by Beyonce and Lady Gaga to start the ceremony.