The television star was in trouble in 2012 when she suffered from a hemorrhage after giving birth.
Amanda spoke by giving the very first radio play for her new charity single Over the Rainbow, which helps raise vital funds for NHS Charities Together.
She took the opportunity to discuss her own experience – and explained how she would not be here today without the incredible emergency care she received.
In conversation with Jamie Theakston, co-host of Heart Breakfast, the 49-year-old listeners shocked the listeners by revealing how close she was to die.
British judge Got Talent also explained how staff helped her come to terms with the stillbirth of her son Theo.
“I owe my life to the NHS without being overly dramatic,” she said.
“When I gave birth to Holly, my 8 year old daughter I know is listening, it was an emergency and I had a hemorrhage, basically.
“In fact, I died for 40 seconds, and then I went into a coma, but the NHS was there holding my hand and my husband’s hand which – I’m sorry for him being honest, he went through everything looking at it!
“My sister had a car accident three years ago and suffered a brain injury, she is fully recovered, but they were there for that.
“So of course it has been well documented that Chris and I had a child, a little boy named Theo who was born sleeping in an NHS hospital and again, they were amazing to us, we wouldn’t have could pass without them. “
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Pal Jamie said, “And I know you always said you wanted to do something for yourself and give something back to them.”
“I’m getting a little emotional – I’m so proud of you. What an incredible thing to do! ‘
Her song Over the Rainbow will help raise funds for NHS Charities Together – something Amanda says she is “proud to do.”
Connect to Heart Breakfast with Jamie and Amanda, weekdays from 6:30 a.m. to 10 a.m.