George Michael has revealed that his battle with pneumonia left him with a five-week gap in his memory.
The star, speaking at length about the illness which left his life in the balance, said it was "touch and go" whether he pulled through for three weeks.
George, 48, said he even had to learn to walk again as his muscles wasted away during his recovery late last year.
In an interview for Radio 2, he admitted: "It's like I just dodged a bullet."
He told presenter Chris Evans that the severity of the illness could have been avoided if he had followed advice to have a health check weeks earlier.
Prior to discovering he was suffering with pneumonia, George had been forced to axe a show at the Royal Albert Hall after his temperature and heart rate shot up, but he shrugged off advice to get examined, assuming he had got over it.
"I went and played for another three weeks in Europe, he said. "And then one afternoon I was having lunch and suddenly felt really odd and said to everyone that I need to go and lay down for half an hour on my own.
"And that's the last thing I remember for five weeks. It was three weeks of them trying to save my life and two weeks awake.
"I literally had to learn to walk again and weird stuff, because when they keep you sedated for that long your muscles literally atrophy at an incredible rate. And I just woke up like this feeble old man."
The singer also confirmed that he is scheduled to perform at the Olympics closing ceremony saying "That's the plan yes, that I'll be playing a couple of songs to kick off the concert at the end."