Love the original 16 tons song, got it in the car the other day, learn't all the words: https://www.youtube.com/watch?v=zUpTJg2EBpw
Never knew there was a ZZ-Top version.
It was featured in back to the future, at least being at the top of the charts when he went back in time: http://backtothefuture.wikia.com/wiki/16_Tons
Can also spit out on the guitar Crooked Jack (Irish folk song) : https://www.youtube.com/watch?v=99WtiCmRUWc
A similar blue-collar downtrodden song full of grit.
https://www.youtube.com/watch?v=99WtiCmRUWc
I learnt it as I used to do photography/video's for an Irish group in London and loved it: https://www.youtube.com/watch?v=zON0ToKY4aE&t=146s
