I'll admit to holding Dusty Springfield's as the *definite* version, but for sheer hot buttery, ever-lovin' smoothness, you have to own the Isaac Hayes version as well.
This is a SERIOUSLY sexy record.
A breathtaking cover of the Jerry Butler classic, drawn out to 11 1/2 minutes of heartwrenching glory. A true masterpiece from Hayes' most brilliant period. Beautiful string arrangements by Dale Warren, and ghostly backing vocals make this something that you won't soon forget.
from The Isaac Hayes Movement, available on CD (Stax/Fantasy)