Embedded Player As part of our series about students and teachers, musicologist Bruce Nemerov describes the way that one song is recorded by several different musicians in different decades of the 20th century. The older musicians are teaching the younger musicians through the song "Sitting on Top of the World." We hear the song as recorded by Al Jolson, The Mississippi Sheiks, Howlin' Wolf, Eric Clapton, Bill Monroe and The Grateful Dead.