Amy Winehouse's ex-husband is on a life-support machine after collapsing following an apparent drink and drug binge, said his girlfriend.
Blake Fielder-Civil, 30, was found choking in bed by his partner Sarah Aspin last Friday, and was taken to hospital with multiple organ failure.
The recovering drug addict had gone out drinking with a friend the previous day, and Ms Aspin, who is mother to his 15-month-old son, said she believed he might have taken an illicit substance.
Fielder-Civil was put into an induced coma and is fighting for his life in hospital in Dewsbury, West Yorkshire.
Ms Aspin, 34, who met Winehouse's former husband in rehab three years ago, told the Sun: "The doctors said they put him in a coma to help him and due to infection.
"I'm praying he'll survive, but I'm having to prepare myself that he may never wake up."
She said Fielder-Civil attended an appointment with the Probation Service in Morley and then met a friend the day before he was rushed to hospital. He had returned home slurring his words and staggering before being put to bed.
Ms Aspin found him unconscious when she woke the next morning, and paramedics confirmed he had choked on his vomit.
Mitch Winehouse urged his daughter's fans to pray for her ex-husband, saying it was "terrible news". Writing on Twitter, he said: "Remember Amy loved him. Let's pray for his recovery."
Fielder-Civil has had a long battle with heroin addiction and spent time in prison in 2007.
He was jailed again in June last year for burglary and possession of an imitation firearm, and was only freed with a tag two weeks ago in preparation for his full release.
The former music video assistant married Amy Winehouse in 2007, but the couple divorced two years later.
Back To Black singer Winehouse was found dead in bed at the age of 27 at her London home in July last year after a long battle with drink and drugs.