Always liked the mellow treatments of Motown classics. A few examples:

https://www.youtube.com/watch?v=PTA8yhRTL0I

https://www.youtube.com/watch?v=F39zVLXzs-Y

https://www.youtube.com/watch?v=CKVjFQTbIGU

And McCartney's live take on "Hitchhike."

https://www.youtube.com/watch?v=ML_crfyVWYQ