The new album, Lioness: Hidden Treasures, features 12 songs, including previously unreleased tracks, alternative versions of existing songs and a couple of new Winehouse compositions.

It was put together by long-term collaborators Mark Ronson and Salaam Remi in association with Winehouse's family, management and Island Records, following the singer's death in July.

Amy's father Mitch said the new album stood up to the standard of Winehouse's two official albums Frank and Back To Black

"I spent so much time chasing ...