SAVE 50% ON AN ANNUAL PLAN FOR YOUR FIRST YEAR Enlists Justin Bieber, Ne-Yo For Solo Album

'It's pretty diverse,' Black Eyed Peas frontman says of '#willpower'.'s solo album, #willpower, will have more star power in the form of several A-list collaborations. So, just who is making the cut for the fall release and who isn't?

Notably, Justin Bieber, LMFAO, Ne-Yo, up-and-comer [article id="1685435"]Eva Simons[/article] and Nicole Scherzinger will all get their time on the album. However, Mick Jagger and Jennifer Lopez -- who appeared on the track "T.H.E. (The Hardest Ever)" -- and Cheryl Cole and Nicki Minaj -- who lent their voices to "Check It Out" -- won't make the final cut.

"There's classical sh--, like just me and a guitar and an orchestra or me with just an orchestra and a kid's choir," will told "There's some ghetto, ugly, dirty stuff. And then there's dance stuff, global world stuff and, like, avant-garde, left-of-center, for-art's-sake music that has nothing to do with getting played on the radio. I'm just art-ing out. It's pretty diverse."

[article id="1677263"]will hit the studio with Bieber[/article] (who has a new album, [article id="1687691"]Believe[/article], out this week himself) back in January. Other rumored collaborators on [article id="1678147"]#willpower include Britney Spears[/article], who he previously said makes a "crazy" appearance. Alicia Keys, Swedish House Mafia, Shakira, Busta Rhymes and Swizz Beatz all reportedly appear on's album as well.

will makes it clear that with the Black Eyed Peas on a break, he has to be creative about how he approaches his solo music without his comrades. "What I have going against me is everybody saying, 'Where the other three people at?' " he said. "I can't just go out with a bunch of background dancers to make up for the fact Fergie, Ap and Taboo aren't there. So I have to come up with a different idea and invent something to make people say, 'Dang, that was better than what you were doing with the Peas!' That won't be easy, but if I can't do that, I'm staying home."

Don't miss [article id="1687565"]"Bieber Live"[/article] tonight at 7:30 p.m. ET/PT on MTV.