He's not the first musician to change up some of their hit songs to deliver the hand-washing message, with Liam Gallagher taking to Twitter and changing hit Oasis songs Supersonic, Champagne Supernova and Wonderwall to Soapersonic, Champagne Soapernova and Wonderwash respectively.
Kicking off the rewritten song in times of the COVID-19, he sang: "Hands.washing hands. Give it a try okay?", he shared before he began to strum his guitar and sing the well-known lyrics to his 1969 smash hit, "Sweet Caroline".
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Diamond, who announced he was retiring from touring in 2018 after being diagnosed with Parkinson's disease, also performed Sweet Caroline as part of a short set at a Las Vegas benefit gala on March 7.
The parody lyrics - much more appropriate for a pandemic than the original "hands, touching hands" - have amassed more than 100,000 likes on Twitter, as well as thousands of comments thanking the legendary singer-songwriter for the uplifting musical gesture.
"Stay safe out there!"
Instead of the words "hands, touching hands", he says "hands, washing hands".