Amy Winehouse's ex-husband Blake Fielder-Civil is reportedly demanding a $9 million divorce settlement - because he was the inspiration for her hit album Back To Black.

The pair's two-year union was ended at London's High Court on Thursday when a judge granted the couple a decree nisi after Winehouse admitted adultery.

Now Fielder-Civil has asked for a mammoth pay-off to reflect the royalties she raked in for her 2006 breakthrough record - written after he walked out on her.

A source tells Britain's News of the World, "Amy did write Back to Black when Blake left her, but why on earth should he be getting a dime for making her feel so bad?

"She was at her lowest ebb when she wrote that album. Her boyfriend had left her for another woman and she poured her heart and soul into the writing process.

"It's like saying that the man who writes a book about his murdered wife should give the murderer some of the profits. It's an absolutely ridiculous request."

Fielder-Civil has six weeks to negotiate the financial settlement or walk away from the marriage with nothing - but Winehouse is fuming over the prospect of paying him.

The insider adds, "The judge has given the decree nisi, and the decree absolute will follow in six weeks. Blake has to make a claim before that but he has made it clear to Amy privately he wants millions. She believes she's right and Blake has no real case for a stake at her money.

"He thinks he was a big part of her success with Back to Black and deserves money for what he put up with. Amy is furious and doesn't want to negotiate. But she's happy for his outrageous demands to be made public because she wants to show him up."