Green Day‘s Billie Joe Armstrong has opened up about his love for the Millwall Football Club and experiencing British culture.The legendary pop-punk band – consisting of Armstrong, bassist Mike Durnt and drummer Tré Cool– spoke to The Guardian in a new interview about their forthcoming album ‘Saviors’.The bulk of Green Day’s album was written in RAK Studios in London alongside longtime producer Rob Cavallo. After being asked about their favourite thing about London, Armstrong dove into his attendance at football games.“I went to a lot of football games: Arsenal, Leyton Orient, Fulham.