In simple terms, Green Day and Rock Band are friends. There have already been several Green Day tracks released for Harmonix's musically inclined baby and it was announced today that even more are on their way later this month. Starting December 15 on the Wii and Xbox 360 – and December 17 on the Playstation 3 – players will be able to grab three new Green Day tracks from the band's 21st Century Breakdown album: "Christian's Inferno," "Last of the American Girls," and "¡Viva La Gloria!". The tracks will be available individually for $1.99 / 160 / 200 Wii points. The full track pack will be available on PS3 and Xbox 360 for $5.49 / 440.