Johnny Cash song

I've never particularly been a fan of what is sometimes called "Country" music, but I have appreciation for those (like Dolly Parton, like Johnny Cash) who have real talent in that style.

I was surprised, hunting around for a version of "I Heard the Bells on Christmas Day" that used the tune I know (the Christian group Casting Crowns does a version, but they use a different tune and change a few of the words), to find that Johnny Cash did the song:



(Forgive the ad; I guess that's how YouTube makes its money).