While idly singing Adele's Easy on Me I started hearing the piano to Man With The Child In His Eyes.

Technically this shouldn't work, and almost (and probably) doesn't. Either a good lesson that you should 'try' things rather than relying on Tunebat/Googling keys, or a trainwreck lesson that you can't force things.

Not sure which it is at the moment, but putting it out there anyway because I think it works enough. And there aren't enough Kate Bush mashups in the world!

Adele - Easy On Me
Kate Bush - The Man With The Child In His Eyes