Sir Elton John

In 2010, Sir Elton John, 76, spoke with late host Larry King about his health issues, which began when he started feeling sick and tired, for no apparent reason.

The 'I'm Still Standing' singer said: “I talked to my doctor, and I must admit, you know, I'm sometimes quite renowned for my outbursts and I was just very frustrated, maybe a little frightened. But the upshot was, I went back and he said, ‘Listen, all you've got to do is have this pacemaker put in.’

"It took an hour-and-a-half. I was back in France within 36 hours, recovering. And it's been fine.”

He added that "you can feel the bump in my chest”.