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
Viagra Boys and Amy Taylor’s cover of In Spite of Ourselves is an interesting take on the original by John Prine and Iris Dement.
I love seeing Viagra Boys mentioned here.
Love them! This song in particular is pretty meaningful for me. My dad has always had a bit of a narrow conception of what “good” music is, so while we could bond over stuff he liked, he’s never been particularly receptive when I’ve shown him new stuff. John Prine was his favourite artist, though, and this cover got him to open up a little.