In an interview with "Kerrang!", Armstrong said that 2009 would "be a fair estimate of the release date of their new untitled eighth studio album for Green Day." It was revealed that Butch Vig would be producing the upcoming album in an interview with Carson Daly. The gap of nearly five years between their previous album, "American Idiot", and their newest release was the longest gap in Green Day's career. While the band had been working on new music since January 2006, by October 2007 Armstrong had written 45 songs, the band showed no further signs of being close to releasing a new album until October 2008, when a video of the group recording with producer Butch Vig in the studio was posted on YouTube.