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Amy Winehouse and Tony Bennett duet to be released

ARGANDA DEL REY, SPAIN - JULY 04: Amy Winehouse performs on stage during Rock in Rio Day 3 on July 04, 2008 near Madrid in Arganda del Rey, Spain. (Photo by Carlos Alvarez/Getty Images) *** Local Caption *** Amy Winehouse
Carlos Alvarez
Amy Winehouse performs on stage during Rock in Rio Day 3 on July 4, 2008, in Arganda del Rey, Spain.
Getty Images

(CBS) - Amy Winehouse left behind a great amount of unreleased music but at least one of her songs, a duet with jazz legend Tony Bennett,  will be made public.

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On Tuesday, Bennett confirmed during his appearance on "The Today Show" that the proceeds of their duet "Body and Soul" will go to the charity Winehouse's father, Mitch, is founding to educate youth and fight drug addiction.

Grammy winner Winehouse died on July 23, and,  although the official cause of death has not been determined, the singer had been in a constant struggle with her drug and alcohol addiction.

The soon-to-be-released single was recorded in March at the Abbey Road Studios in London, making it one of Winehouse's last produced songs.

The song's original purpose was to be included on Bennett's "Duets II" album, which will be released on Sept. 20. Along with Winehouse, the album includes stars such as Lady Gaga, Mariah Carey and John Mayer.

After her death, it was decided to have the duet released ahead of Bennett's album as a charity single.