Amy Winehouse's father Mitch has admitted his extramarital affair could be partly to blame for his daughter's problems.
Though the Back to Black star capped off a remarkable year with five wins at the Grammys, her professional success has been marred by personal problems.
The 24-year-old was admitted to a north London rehabilitation clinic after the Sun newspaper publicised footage of her smoking what appeared to be crack cocaine and fears have been expressed for her mental fragility while her husband Blake Fielder-Civil remains in prison on charges of GBH and attempting to pervert the course of justice.
And according to Mitch, a taxi driver, his lengthy affair with a work colleague may in some part have sparked his talented daughter's troubles.
Speaking on BBC1's One Life: Rock Star Parents, he explained that he began a relationship at work around 18 months after Amy's birth.
"The children used to call Jane 'Daddy's work wife'," he said. "I did not leave home until Amy was ten, so the situation occurred for another eight or nine years before I left home. It was difficult."
"I should have left earlier, I should have left sooner. There was not really a negative response from Amy [when I left], but she definitely became a lot more independent.
"Perhaps deep down she felt her parents were splitting up, she could not rely on them to stay together and that it was about time she learned to look after herself."
Mitch, who now lives with his second wife, admitted he thought Amy was "over it pretty quickly".
"Maybe she could not articulate it in words, but she certainly did it with music," he added.
It has been confirmed today that Amy is to play this year's T In The Park festival, after cancelling her appearance in 2007 reportedly on the advice of her doctor.