Amy Winehouse was reportedly given the all-clear by doctors less than 24 hours before her death.
The 27-year-old singer visited medics on Friday and doctors could find nothing wrong with her, but on Saturday afternoon she was found dead in her bed at her home in Camden, north London.
A source told The Sun newspaper: "The doctor was happy with her condition. When he left on Friday night he had no concerns. Less than 24 hours later she was found dead.
"Amy's health has been very fragile and she has been having a series of check-ups."
The 'Rehab' hitmaker had been having regular check-ups because her drink and drug addictions had left her so frail.
Amy's lifeless body was discovered by her security guard Andrew Morris just before 4pm and it is still not known how she died.
Her publicist and friend Chris Goodman said: "Amy was on her own at home apart from a security guard who we had appointed to help look after her over the past couple of years.
"She was in her bedroom after saying she wanted to sleep and when he went to wake her he found she wasn't breathing. He called the emergency services straight away. He was very shocked.
"At this stage no one knows how she died. She died alone in bed."
While the cause of her tragic death is yet to be confirmed, it has been claimed that she went on a drink and drug binge following a row with on/off boyfriend Reg Traviss.
Filmmaker Reg was reportedly furious when he discovered Amy had been phoning ex-husband Blake Fielder-Civil in jail, leading to a furious argument.
A source told the Daily Mirror newspaper: “Reg found out Amy and Blake had been chatting and got upset. The pair had a fight and Reg walked out. She had been drinking more and more whisky."
An autopsy is due to be carried out on the 'Rehab' singer's body today to determine the cause of death.
No drugs were discovered at her home by police or paramedics who attended the scene.