With the biggest punk band in the world currently in the midst of a triple album release (that's the ¡Uno!, ¡Dos!, ¡Tré! trilogy in case you've been under a rock recently), MusicRadar's sister magazines Total Guitar and Metal Hammer have been hard at work putting together the ultimate fan-app on the band, for the iPad and iPhone.
Slated for release in the new year, the app will include a top 20 countdown of the best Green Day songs of all time - and its makers want your opinions and comments to decide the ultimate countdown.
Simply tell us what your favourite Green Day song of all time is below - and more importantly tell us why you love it so much. We'll then put the most nominated songs songs into a shortlist for you to vote on.
So whether you're a basket case, a walking contradiction or simply stuck down a boulevard, we want to hear from you!