Good song to audition with?

My school is doing sweeney todd this fall and auditions are coming up! I'm very excited to do this show, but I'm at a loss at what song to audition with since i am more of a "happy" musical type. I'm a second soprano, blond hair blue eyes, 5'4. I am experienced enough in musical theater to know NOT to do anything from Wicked, Phantom of the Opera, Les Mis, and Fiddler on the roof, so no suggestions from any of those shows please! Any other suggestions would be mucho appreciated, Thaaanks:)