On track 12, (Homecoming/Death of St Jimmy/Nobody Cares/Nobody Likes You/Rock 'n' Roll Girlfriend/We're Coming Home Again)at about 6 minutes into the song you hear Tre Cool singing in Rock 'n' Roll Girlfriend. When he sings "I haven't cracked or smoked nuthin' in over 20 shootin' days so get off of my case" there are backround vocals. Listen closely and you will hear Billie Joe sing "Don't wanna be an american idiot."