The Angels singer was on his The Heavy Entertainment Show Tour, heading towards Russian Federation to play at both Moscow and St Petersburg - but had to pull out due to ill health.
Sharing a video on Twitter, the singer can be seen sat on a bench in the garden of his impressive home in the hills of LA while he updated his fans on his health.
"So you know if I can't do it then there's something going on that I just can't do it".
In the video featured below, the "Angels" hitmaker raises alarm bells as he speaks about his health, revealing how he ended up in intensive care after being struck by a mystery illness which forced him to cancel the last two dates of his European tour.
"I was a soldier, and I needed to finish that tour, I needed to go to Moscow and St Petersburg".
"Unfortunately, that illness kicked in just at the end of my tour, a tour which was going so well", Williams adds.
He added: 'They were very worrying and I ended up in ICU, so I couldn't go.
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"I haven't pulled out of a tour for bad health since 1998 so you know if I can't do it then there's something going on that I just can't do it".
The singer closed his statement by saying: "I can't wait to get back to work".
Robbie Williams has revealed that he cancelled gigs recently due to "very worrying" medical test results.
"I'm so glad you're ok. Glad your ok!. we love you".
While a third wrote: "Awwww this is lovely".
His health problems were exacerbated by a slipped disc, and the star has been vocal about how important he finds it to be both physically and mentally healthy in order to perform to his fullest.
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