Nat & Alex Wolff made the "Look Outside" song of 3:08 long. Another official melody that cannot yet be easily spread as the official songs for new films, begin to go into free circulation after some time only. Pleasant melody on the piano with no less pleasant voice of a boy, aged something about 25 years old. Performed by the main actor of the film – this is its salt.
Reference: Nat & Alex Wolff's "Look Outside" Is 'Paper Towns' In Song Form - Read on BUSTLE