I thought you guys were all straight-edge, but I recently saw a photo of Pete drinking alcohol. “I will never believe in anything again” – I think it came from when Bush was re-elected. What are your favourite Pete Wentz lyrics on the album? “These Arms of Mine” is one of the most perfect recordings ever. Otis wasn’t always in key, but he was always singing the right way. Otis Redding going balls-out, when he’s really going for it. When we were nominated for a Grammy, I remember being there and saying, “I don’t belong here.” Elvis Costello was sitting across from me, and Stevie Wonder was up onstage, and I said, “I need to step my game up, just so I don’t feel disrespectful.” After that, I started practising a lot. Obviously you’ve become more comfortable performing. On “What a Catch, Donnie”, I sing really deep, and I was like, “Wow, I’m just impersonating Bowie.” All of a sudden I had a British accent. On the new album, do you attempt to impersonate anyone? I was bashful about singing in front of people, but when you’re making a joke of it, it’s a different story. I can do a good Tom Waits and a good Prince. I started out doing a bitchin’ Elvis Costello impression. I got into singing because I was an impressionist. As I go through bands’ catalogues, I hear songs and I’m like, “That’s not Dad? That’s the Eagles?” The world does not know the name of David Stump! He was always playing around the house – like a greatest-hits jukebox. My dad was kind of a peripheral character to Sixties and Seventies players like John Prine and Steve Goodman. So your father was involved in the Chicago folk scene? “It’s about the way pop culture pumps up our desire for useless crap,” says Stump. “A whole new type of crazy.” Over the disc’s 13 tracks of intricate, punk-infused pop, the emo superstars explore themes of adultery, materialism and vanity, and how stardom can make people go completely mad. “When two people with independent neuroses come together, they can become exponentially crazier,” explains the band’s 24-year-old singer and guitarist, Patrick Stump. The title of Fall Out Boy’s fifth album, Folie à Deux (which was released this month), is a psychiatric term that translates to “the shared madness of two”.