I’ve never been a Barry Manilow fan, but your post reminded me of “Maggie Mae” by Rod Stewart. LOL.
He took Chopin's Prelude in C minor, Op. 28/20, which is a mere 13 bars long, and turned it into "Could This be Magic?", which ran for something like 8 minutes.
There is a special circle of hell for people who do things like that.