Mitch Winehouse is praying for Amy Winehouse's ex-husband Blake Fielder-Civil, and urging her fans to do the same, after Civil suffered multiple organ failure after a drinking binge.
Winehouse took to Twitter to express his sadness at the news, urging fans to remember how important Fielder-Civil had been to his superstar daughter.
He tweeted: "Terrible news about Blake this morning. Remember Amy loved him. Let's pray for his recovery. Mitch."
Despite Fielder-Civil being widely accredited with introducing Amy to hard drugs, Mitch Winehouse has previously offered an olive branch.
"I've made my feelings absolutely clear about Blake over the years," Winehouse said in an interview with The Sun newspaper in July. "He's got a lot to answer for. The thing is, whether I like it or not, Amy loved him at one point in her life.
"He has been in jail up north, but if he sorts his life out I wouldn't rule out the chance of him doing something with the education we have planned in the future. It's a long way off, but if he can turn it round, anyone can."
Civil was discovered by girlfriend Sarah Aspin on Friday night after a drinking session the previous day. Civil, who is a recovering drug addict, is thought to have taken an illegal substance during the binge. He is currently in a coma in Dewsbury, West Yorkshire.
Below: Amy Winehouse's legacy - the beehive to the denim shorts
The beehive: The incredible hairdo was invented in 1960, and we don''t think anyone has rocked it as well (or as big) as Amy since then. OK, well maybe Marge Simpson. But she''s fictional...
Camden: Camden Town in North London was always synonymous with the singer, and to honour it being her spiritual home, venue The Roundhouse plans to have a statue of Amy installed to serve as a memorial.
The voice: No one could sing like Amy. She truly was one of the most outstanding and instantly recognisable talents the UK has produced, taking an ageing genre and making it sexy, relevant and incredibly cool.
The Tattoos: Amy was asked to cover up the naked woman on her left arm for a performance at the Grammys in 2008, so rather than putting on more clothes, she just drew a bra on the girl. Nice.
Those denim shorts: Did she ever wear anything else?
The excess: The troubled singer maintained a constant battle against drink and drugs. Although the star was clean of any illegal substances at the time of her death, it was a huge alcohol binge that ultimately caused her untimely demise.
The bad-boys: The singer was famously friends with the equally troubled Pete Doherty, and her on/off marriage to Blake Fielder Civil was littered with rumours of assault and drug abuse. Civil even once told a British newspaper that he introduced Amy to Crack Cocaine and Heroin.
''Rehab'': No, not the clinic, the song. As the first single from second album ''Back to Black'', ''Rehab'' received huge critical acclaim and rocketed Amy to stardom. She went on to release massive hits ''You Know I''m No Good'' and ''Tears Dry On Their Own''.
She was funny: A couple of appearances on BBC''s Never Mind The Buzzcocks showed that she was not only funny, but more than happy to give Simon Amstell as good as she got.
Mitch Winehouse: Amy was incredibly close to her father Mitch, and had a tattoo saying ''Daddy''s Girl'' on her arm. Mitch was a professional singer in the 1970s, and last year tried to reignite his musical career.