Here are a few to get things started:
Don Henley’s The Boys of Summer as an 80s synth tune
Bossa nova version of Crowded House’s Don’t Dream It’s Over
Reggae-ish version of Aretha Franklin’s Respect
A capella men’s ensemble version of Lady Gaga’s Bad Romance
Me First and the Gimme Gimmes cover of All My Loving
Or this revision of Pioneer to the Falls by Interpol, made by the band’s former bassist Carlos Dengler
https://youtu.be/uq7gEq9Pwws