Willie Nelson is a goddamned American treasure.
I don’t own any of his cds, and there are only a couple of singles that I could conjure sans Google/YouTube, but man, these duets with other goddamned American treasures are spectacular.
And this one, this one has Emmylou.
Can’t beat Emmylou.
AbsurdBeats 
Amen. I’ve been able to see him twice in concert. An amazing performer.