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
Those first couple of Shrek soundtracks were full on bangers. Pete Yorn’s cover of Every Fallen In Love (With Someone You Shouldn’t Have) is a masterpiece.