Waylon Jennings on The Johnny Cash Show in 1969. The country great was still clean-shaven here, but already moving in the direction of his “outlaw” country sound even then.
 

 
Here’s another shit hot live version of “Only Daddy That’ll Walk the Line,” from what appears to be Hee Haw. I am currently monumentally obsessed by this song. I could play it on a loop for 24 hours. That fuckin’ guitar solo is sublime city, baby!
 

 
Here’s a link to Linda Ronstadt’s more Flying Burrito Brothers-ish sounding version of the song, rechristened “Only Mama That’ll Walk the Line,” a staple of her live show in the late 60’s.

In case you were wondering (and I know you were) the mega-hottie on keyboards is Jennings’ then newly-wed wife, Jessi Colter. Below, Jessi Colter performs her 1975 pop-country crossover hit, “I’m Not Lisa”: