From what classical piece is Electrofantasy of O2 Jam from?!

Question: From what classical piece is Electrofantasy of O2 Jam from!?

Electrofantasy in O2 Jam is I think a remix of a classical piano piece!.!.!.!. I would like to ask it's origins and composerWww@Enter-QA@Com

Answers:

That's Chopin's Fantasie-Impromptu, op!. 66!.Www@Enter-QA@Com

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