Musically, "Oh What a Circus" is a contrafactum, and shares its composition with the better known "Don't Cry for Me Argentina" from the same show, but has a faster tempo and completely different lyrics [REF].
An uptempo version of the main melody for "Don't Cry for Me Argentina", "Oh What a Circus" acts as an introduction to the whole musical and is sung after "Requiem for Evita", as Che ponders about the life of Eva.