It's been almost 4 years, but Green Day is finally ready to go back into the studio.
Their last album, American Idiot, was a huge hit selling Their manager says they're expected to get into the studio in January, and already have 45 songs for the album.
Frontman Billie Joe Armstrong says, "We have a lot of music. It's total chaos... I want to dig into who I am and what I'm feeling at this moment - which is middle-aged.