John Peel famously took the needle off The Undertones' Teenage Kicks and immediately played it again, it was such a perfect pop song. He was, of course, absolutely right.
I had the same reaction hearing Eli Paperboy Reed's Cut Ya Down the other night on FIP. Theoretically it's a problematic piece of music: it's a take on a traditional gospel song and retains all its fire breathing god bothering ways. It's also a white guy (a Yankee no less!) doing his take on a juke joint jam. But holy crap is it an amazing piece of music. Have a listen.