This is a video of The Song Brown Paper White Paper sung by Flight of the Conchords. Brecht used songs to break the illusion, so the audience were constantly reminded that they were watching a performance and songs allowed the fake reality to be broken. Songs are used to divide up the action and distance the audience from their imaginations. Using lyrical vocals help keep the audience awake and engaged in the performance. I think it's important to include this song as it helps break the fourth wall and detach the audience members from their emotions.