Saw Johnny at Kings Hall in Manchester(UK) in about 1972. He sang a song I'd never heard him do before as a request for a lady in a wheelchair. Turned out that he never had done it before, but that's what she wanted to hear, so that's what he sang.
He didn't quite get the words right in places and the guitar was a bit basic, but so what. Thats Icon as far as I'm concerned!

FC