A new track featuring previously unreleased vocals by Amy Winehouse has surfaced.

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Rapper Nas had formed a friendship with the Back to Black singer before her tragic death from accidental alcohol poisoning a year ago, and uses one of their collaborations for the chorus of his new track Cherry Wine.

In the song, Amy sings the lines: ”Where is he / the man who is just like me / I heard he was hiding / somewhere I can’t see.

”I’m alone / and I realise that when I get home / I want to go to my red and my cherry.”

The track was produced by Salaam Remi, who had introduced the singer and the rapper, and worked on both of Amy’s albums released when she was alive, Frank and Back To Black.

Another collaboration between Nas and Amy, Like Smoke was released on the posthumous album, Lioness: Hidden Treasures.

Speaking about that track, Nas said hearing it back was difficult for him.

He said: ”It’s a bittersweet feeling to do something with her now that she’s not here. I’m happy… the sweet part is that we do have the music, fans have new music from her.

”The bitter part is that she’s no longer here to really give it to us and to really live her music and for us to see her smile and hear her voice.”

Cherry Wine appears on Nas’ new album, Life Is Good which also features work from Drake, Rick Ross, Mary J Blige, Swizz Beatz and Heavy D and will be released on 17 July.