Here's the back story:

This guy came in as a guest on the Opie & Anthony radio show. When they brought this guy on they had no idea he could sing. It was just going to be a radio bit promoting their upcoming "homeless shopping spree." During the interview it came up that he has written some songs and could play guitar. So they went and got the man a guitar (he did not own one himself) and he proceeded to shock the hell out of everyone.