The Amnesty International Campaign to Save Darfur. The performance marked the first for any acts appearing on the charity album, which will help raise funds and awareness for Amnesty International's efforts for Darfur, Sudan. Billie Joe Armstrong says his group chose to perform Working Class Hero on the album because "its themes of alienation, class, and social status really resonated with us." The two-CD set, which also features Lennon covers from acts like Christina Aguilera, U2, ...