"We'd love to be the biggest band on the planet." Yes, despite being surprisngly short, it is clear that Fall Out Boy bassist, Pete Wentz, has high hopes for his band's future.

Sitting in the conference room backstage at the BIC on Saturday, we met half of Chicago's finest, as well as bumping into guitarist Joe Trohman on our way out.

Unexpectedly, singer Patrick Stump did most of the talking, although he doesn't connect with the crowd as well as Pete on stage.

Currently on a short tour of the UK, Fall Out Boy will also be found playing to huge festival crowds this summer but indoor venues like the BIC are their favourites.

Although festivals mean they get to play with bands that they wouldn't normally, Pete has plenty to say about the downside of big outdoor gigs.

"Everyone thinks they're the most important person on the planet, the guy laying down the cable, the guy delivering the water, the guy singing in the band..."

Patrick adds "Nine out of 10 bands are awesome to play with but there's a whole long list of those we aren't so friendly with. Everybody doesn't get along with everybody."

At last year's Reading Festival, their good friends Panic! At The Disco's frontman Brendon Urie was knocked out by a bottle flung from the crowd.

"Panic! are troopers. The emo war is not lost" says Wentz speaking about the bitter subject in which they have been unintentionally involved.

"The thing with emo bands is everybody is basing their music and personas on people in Britain from like the '70s."

Fall Out Boy's music has evolved throughout their three albums and they've become more adventurous with their songwriting style.

"We loved it when we sucked" laughs Patrick. "We're playing tighter as a band, it's not a case of better or worse."

Their musical influences range from Guns n Roses to Prince and Michael Jackson to Green Day. However, their musical tastes are equally eclectic, and include Radiohead and Get Cape Wear Cape Fly, currently unknown in the States. "Even though we don't get much modern British rock in America, if you dig you'll find good stuff."

When asked about their collaboration with Jay Z, Pete said: "It's crazy, it's Jay Z. We bugged him and bugged him and bugged him and eventually he gave in."

Pete's interests outside touring are, surprisingly uninspiring for a rock star: "I like to hang out with my bulldog."

But then Pete is from a non-musical background whereas Patrick's dad was a folk singer.

"It was never serious, he only wrote about 12-20 songs but he was always singing around the house."

After the interview we realised we'd picked up a new found motto from Patrick: "I didn't choose the game, the game chose me"

This small band with big hopes proved to their sell-out crowd that they are well on their way to world domination.