Amy Winehouse third album 'about Blake Fielder-Civil split'

Amy Winehouse's posthumous third album will reportedly chart her turbulent marriage and subsequent divorce from Blake Fielder-Civil.

The singer, who died in her London home last Saturday, was working on a follow-up to 2006's Back to Black and the tracks - said to be her most personal to date - will allegedly be released.

Most of the songs, which also detail her decline into alcohol and drug addiction, are said to be demos, for which Amy wrote lyrics and laid down a backing track. Sources told The Mail on Sunday that they are likely to be released next year, using Amy's vocals or contributions from friends.

Proceeds from the material would go to the foundation that father Mitch plans to set up to help those battling addiction.

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A spokesman for Winehouse's family told the paper: "Amy always had a notebook on her and would write down lyrics and ideas. People who have heard the new songs say that they are very, very good and that they are as autobiographical as ever.

"The period after 2006 was when Amy went through the most emotional upheaval, with Blake going to prison and then their divorce."

Long-time producer Salaam Remi had previously called her third album "a work in progress" and said that her estate was yet to approve the release of the material.

Meanwhile, Winehouse's £6m fortune has apparently already increased to £10m due to a number of shows shortly before her death and record sales after it.

An industry insider said: "We are seeing the creation of an international cult around Amy. The fortune it creates could top £60m or more."

Watch Amy Winehouse perform 'Love is A Losing Game' live at Brixton Academy below: