Mitch Winehouse finds it tough to listen to his daughter's most successful album back to black because some of the songs are about her damaging relationship with ex-husband Blake Fielder-Civil.
Writing in a new memoir, Amy, My Daughter, Mitch explains how he could never understand why Amy - who had a turbulent two-year marriage to Blake before their 2009 divorce - fell for the former heroin addict.
He wrote: "It wasn't as if he brought much good into her life, or so it seemed to me."
In the book, which is released next Tuesday, Mitch also reveals Amy - who died of alcohol poisoning aged 27 in July 2011 - suffered from stage fright and had considered getting plastic surgery on her nose following the success of her breast enlargement operation.
Mitch details her battle with drug and alcohol addiction throughout the tome and at one point he admits he worried "her illness might end up killing" them both.
He explains: "Long before Amy was an addict, no one could tell her what to do.
"Once she became an addict, her stubbornness just got worse.
"There were times when she wanted to be clean, but the times when she didn't outnumbered them."
Despite revealing he can't listen to Back to Black - which sold more than 20 million copies worldwide - he insists her jazzy first album Frank was his favourite record of his daughter's.
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