Amy Winehouse left her drug-addled former husband out of her will to ensure he could not win a slice of her fortune.
The singer, who will be cremated today following a Jewish service for friends and family, made provisions to ensure Blake Fielder-Civil would not get a penny following their divorce in 2009.
Her fortune was estimated at £6million in the Sunday Times Rich List of April, but is now said to surpass £10million and growing.
Her acclaimed album Back To Black topped the iTunes chart in 17 countries yesterday, including the UK and the U.S., and is expected to top the official UK charts this week.
Legal experts said Miss Winehouse’s wealth would be divided among her immediate family, including her mother Janis, who is suffering from multiple sclerosis, father Mitch and older brother Alex.
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A close family friend said: ‘Don’t expect everything to be straightforward. Janis is very sweet, but very meek and not in the best of health, Mitch is always the one in charge.’
FUNERAL SET FOR TODAYThe funeral of singer Amy Winehouse will be held today for "family and close friends".
The announcement by her grieving family came after police said they would need to wait up to four weeks for test results to establish a cause of death for the 27-year-old.
A spokesman for the family said: "The funeral will take place on Tuesday and will be a family and close friends affair."
He would not reveal details about the location or time of the funeral, which Jewish law states has to take place as soon as possible.
Scotland Yard said it would be waiting for the results of toxicology tests after the post-mortem examination was unable to establish a formal cause of death.
The results are expected in two to four weeks, a spokesman said.
The body of the singer was yesterday released to her family after they were forced to carry out the arduous task of identifying her at St Pancras Coroner’s Court.
Her parents broke down in tears as they visited a growing shrine outside their daughter’s £2.5million home in Camden Square, North London.
Last night, a close friend told the Daily Mail Miss Winehouse had put her affairs in order following her tumultuous two-year marriage to Fielder-Civil, 29, who is currently in prison.
She wrote the majority of Back To Black about their stormy romance and the friend said: ‘Around the time of the divorce, all of Amy’s finances were sorted out – and Blake can’t get his hands on any of it.
‘I am pretty sure that Amy does have a will. As a matter of course with record contracts, financial advisers will make sure that is done.’
Fielder-Civil was sentenced to 32 months in jail last month for burglary and possession of an imitation firearm.
Speaking from her home in Ruskington, Lincolnshire, his mother Georgette said: ‘He’s devastated and profiting from Amy’s death would be the last thing on his mind.’
Miss Winehouse’s friends and family will today attend a service at a North London cemetery before her body is cremated in Golders Green.