A melody can be harmonized many different ways. And I like to teach HAPPY BIRTHDAY as one of the first melodies for beginning students - on the first string, for both guitar and ukulele. In this lesson video, I present this melody in similar fashion to then add chord voicings once the melody is learned thoroughly. You'll learn the one string melodic approach first and will see that the melodic positions don't change at all even when turning this chord melody arrangement into a swinging, groovy ditty.