Mitchell & Cash. Welch & Rawlings. Harris & Matthews.
Three duos. Three versions. Three fantastic experiences. One song.
The song is "Long Black Veil". I would look the above duets up if I were you. They're all spectacular, and they're all different.
(For the record, I've known about this song for a long time. The gutsiness is sharing it with you. Enjoy some classic music. Drink in the old-timeyness.)