Instead, fans feted Fall Out Boy's new set, "Folie a Deux," on Dec. 16. The collection is not only a celebration of Fall Out Boy's music, but of bassist/lyricist Pete Wentz's record label, Decaydance, as well. The album features guest appearances by a roster of Decaydance acts, including Cobra Starship's Gabe Saporta, Gym Class Heroes' Travis McCoy, Panic at the Disco's Brendon Urie and The Academy Is ...'s William Beckett, among others.

Hurley--who is also joined in the band by singer Patrick Stump and guitarist Joe Trohman--spoke to LiveDaily about the host of special guests on "Folie a Deux," the viral campaign to promote the album and the meaning behind the album title.

LiveDaily: You have a slew of special guests on your album. Who did you learn the most from?

Andy Hurley: Probably Pharrell. Debbie Harry and Elvis Costello, we didn't actually work in the same studio with them. We sent it out. That was so exciting because we love them and we grew up listening to them. But working in the studio with Pharrell was amazing. He's just a musical genius. It's cool to work with someone from a different genre. It mixes it up a little for you. It's awesome. He's one of the nicest dudes. He made hit songs since he was super young. I think I just learned: here's a dude who's made every good song in the last 10 years, whatever. He's still super down-to-earth. He still loves making music. He's not worried about making a certain thing for a certain person or certain demographic. You can tell he's really inspired by music and by writing songs that he loves. I think that's something we already believe in. But just to see a guy like Pharrell who's done so much and he still loves it so much and it's still being done for the right reasons, that's really inspirational.

How did you come up with the album name, "Folie a Deux"?

I think Pete was reading Newsweek and he read the term "folie a deux," which is a psychological term meaning shared madness of two. That kind of is applicable to a lot of things in culture--tabloids and famous people, tabloids and the public--because the public calls for blood and the tabloids think they need to deliver it. The tabloids feel the need to deliver blood because they're like sharks in the water. The people that they're following every second of every day will eventually slip up. The more they slip up, the crazier they look. It's just a thing where two groups cause each other to go to this next level of craziness. The same can be said for anything--politics, bands and their fans. For us, I think it would be applicable to that because our fans are so diehard and care so much. That in turn inspires us and hopefully that inspires them. I think that's kind of what it means to us. It has a lot of different applications

Pete's label is like a family affair, with everyone working on each other's albums. Would you agree?

Yes. The bands I like touring with the most are the bands on Pete's label. They're really our best friends. It really is a family. I love all of those dudes. It is really cool to have them come on. It's like an extended family. It's almost like they're part of the band. It’s not like a guest appearance. We've done so much with them. It makes total sense.

Pete started a viral campaign to promote the new album. How effective was that, do you feel?

That stuff is always cool, I think. "The Dark Knight" took advantage of that, as have a lot of movies lately. I think there's something so cool about that. You have to go out and solve these puzzles, and you don't even know what you're going to get from it. But then you can kind of tease fans with something. In the case of the mix tape we put out, there's a lot of new songs that won't be on the record. That will be the only place they'll be released. We gave that to our fans for free. Hip-hop's got the right mindset of putting out mix tape so much. There's a bunch of new material on mix tapes. Usually, they're free or really cheap. It's just a cool way to try new stuff to keep your fans involved. Stay current I guess, stay fresh.

What was the songwriting process like for "Folie a Deux." Did Pete write all the lyrics as usual?

Pete wrote all the lyrics. I think this is his best record that he's ever written, lyrically. He has stepped outside of himself and kind of written from a lot of different perspectives and took on the role of different characters in his writing for this record, which is really cool. It's something he hasn't done before. Patrick wrote all the music again. He wrote a huge chunk of it, at least. The earlier versions were written on the tour for the last record for "Infinity on High." He ended up with 60 songs and it's kind of just going through those. He writes everything on [the computer program] GarageBand, and it'll be a verse and a chorus and Joe and I and Pete will step in and kind of help finish arranging stuff. This album kind of went a lot differently because we wanted to get the record out originally on the fourth of November. We had a month and a half to two months to do it. It was this awesome challenge to ourselves. We usually have as much time as we want. This kind of felt like "Take This to Your Grave" when we had two weeks or even a week to record it. Everything we were doing on this record was the first thing that felt right. I think there's something really cool about that.

How many new songs are you going to do on your tour?

I'm not sure yet, actually. I hope a lot. But we never want to be the band that we only play new songs: "The songs that kids want to hear, that's old stuff, we don't like that." We'll never be that band. We'll still play the songs that people are wanting to hear.