Like any number of rockers, Young took some cues from Nashville in the '70s. But unlike the others, "Country Neil" is convincingly earnest in his approach on "Heart of Gold," his only number one single from his only number one album, Harvest (1972). A little harmonica, a little peddle steel, his natural twang, and two simple verses that speak of the universal human condition are the song's essence. It's one of those four-chord songs even the most unskilled guitarist can play (Em-C-D-G), thus making it the ultimate campfire song and the first many children of the '70s learned to play on their acoustic guitars. It's difficult to imagine anyone but Young himself singing it -- and he's done that, at virtually every solo and acoustic performance he's played. The song is widely considered his signature.