#willpower is the upcoming fourth studio album by American hip hop artist and record producer will.i.am. The album was originally scheduled for release in September 2012, but was delayed several times and will now be released on April 23, 2013. Guest on the album include Britney Spears, Justin Bieber, Lil Wayne, Hit-Boy, Waka Flocka Flame, Diddy, Chris Brown, Skylar Grey, Juicy J, David Guetta, Demi Lovato, Cheryl Cole, Nicole Scherzinger, Eva Simons, 2NE1, Baby Kaely and apl.de.ap. During the recording of The Black Eyed Peas' sixth studio album, The Beginning, band member Fergie revealed in an interview that will.i.am was in the process of recording a new solo album, tentatively entitled Black Einstein. Just days later, will.i.am confirmed the news, and announced that the album would be released in the fourth quarter of 2011. It was announced by will.i.am in November 2011 that he had changed the title of the album from Black Einstein to #willpower. will.i.am confirmed that he collaborated with Britney Spears, Jennifer Lopez, Cheryl Cole, Nicole Scherzinger, David Guetta, Ke$ha, Alicia Keys, Rihanna, LMFAO, Eva Simons, Chris Brown, Mick Jagger, Busta Rhymes, Demi Lovato, Justin Bieber and Ne-Yo. Kanye West has also recorded for the album.