http://www.sciencebase.com/science-blog/classic-chords-9-all-right-now.html
“All Right Now” was the big 1970 hit from the blues-rock band Free with one of the most recognisable but easy to fluff guitar riffs of all time. Unfortunately, for the budding axe hero, Paul Kossoff was not playing anything particularly simple on a single guitar in this song by bassist Andy Fraser and singer Paul Rodgers. Ostensibly, it’s just a standard A major chord with a jangly bit of an open A7 on the third fret. But, the song has been dissected and aficionados know only too well that there are two guitars overdubbed, one playing the A major with a fretted A on the sixth string and the other playing an A major with a fretted A and E on the 1st and 2nd strings.