Green Day Frontman Billie Joe Armstrong may be in rehab, but that doesn't stop his immortal music from debuting in the soundtrack for 'Twilight: Breaking Dawn Part 2'. The new track's title is 'The Forgotten'-from the third and final album from Green Day's trilogy of records, titled, 'Uno!', 'Dos!'and 'Tre!'. As for the final 'Twilight' soundtrack, expect to hear Passion Pitt, Ellie Goulding, St. Vincent, and Fiest.