For those who thought 'American Idiot' to be Green Day's masterpiece, frontman Billie Joe Armstrong says you ain't seen nothin' yet. The band, who are currently in the throes of recording the follow-up, are looking to write the most powerful songs of the band's 20-year career.

"I really like f---ing with arrangements, and I always try to look at the possibilities of how you write power-pop music," Armstrong tells Alternative Press. "I'm pushing myself to be progressive in songwriting and being a songwriter. I come from a culture where I'm into great albums, and I still believe in that. I'm not saying I can go for it this hard every time -- there might be times when I want to have something that's a little bit more spontaneous and off the cuff -- but with this record, the feeling's been that you've got to just go for it."

As previously reported, Green Day are workign with legendary producer Butch Vig on the new effort. "He's just got a lot of integrity and a lot of class, and one of the things I really respect about Butch is that he doesn't just go for things that are going to be million-sellers, or something that's gonna be massive for the sake of being massive, or is gonna look flashy on his resume or something," Armstrong says. "He works with a lot of different kinds of bands, and it could be a platinum band, or it could be more of a garage band. And he's got a long history of that. I feel like we kind of come from the same place, where he started in Wisconsin in kind of a garage-y atmosphere and working with bands at Smart Studios, and you know, we made our first record for $700."

No word on how much this 'un's gonna cost.