The group's earliest connections go back to the early '90s, when high schoolers will.i.am (William James Adams Jr.) and apl.de.ap (Allan Pineda Lindo Jr.) were part of Tribal Nation, a breakdancing crew. Eventually the pair focused more on music and split off on their own as Atban Klann, their esoteric name an acronym for A Tribe Beyond a Nation. Eazy-E's Ruthless Records signed the group in 1992, but many in the Ruthless camp were puzzled by the group and the enthusiasm of Eazy, who had no problem reconciling his own gangsta style with the affable, peace-minded spirit of Atban. Although an album was recorded, Ruthless shelved it, unsure how to market a group whose style wasn't dependent on violent braggadocio like that of N.W.A.

The death of Eazy-E in 1995 signaled the end of any further deals with Ruthless. Undaunted by the experience, will.i.am and apl.de.ap recruited another dancer/MC, Taboo (Jaime Luis Gómez), and reappeared as the Black Eyed Peas. BEP began playing shows around their native L.A., impressing hip-hop fans with their mike skills and dazzling them with their footwork as well. In 1998 their debut, Behind the Front, was released on the Interscope label to critical acclaim -- not only for the trio of MCs, but also for their live band and backing vocalist Kim Hill. It was a modest commercial success, but it did not leave much of an impact, peaking at number 129 on the Billboard 200. BEP's 2000-issued sophomore release, Bridging the Gap, featured guest appearances from Jurassic 5's Chali 2na, De La Soul, and Macy Gray. "Request Line," a single that reached number two on Billboard's rap chart, helped the album perform significantly better than the debut.

A corner was turned soon after the addition of Fergie (Stacy Ann Ferguson). Formerly featured on the television program Kids Incorporated and a member of Wild Orchid (a late-'90s all-woman trio pitched somewhere between Lisa Stansfield and En Vogue), she replaced Kim Hill and took on a prominent role with her confident, forthright vocals. BEP's first album with Fergie, 2003's Elephunk, stormed the Top 40 with three singles -- "Where Is the Love?" (a Top Ten hit), "Hey Mama," and "Let's Get It Started." Two years later, the quartet returned with Monkey Business, which pushed BEP into the pop stratosphere courtesy of the hit singles "Don't Phunk with My Heart" and "My Humps." In the U.S., it went triple platinum. Fergie released a solo album, Dutchess, the following year. It was no slouch either, as it racked up three number one singles. The album was executive produced by will.i.am -- by that point an in-demand producer for the likes of Kelis, Diddy, John Legend, Ciara, and Nas -- who reentered the solo game with the 2007 album Songs About Girls. Technically his third solo project, it followed a pair of adventurous, low-key affairs issued on the BBE label earlier in the decade.

After the hiatus, the Black Eyed Peas announced their return in March 2009 with "Boom Boom Pow," the first of three number one singles -- which, together, topped the charts for half of the entire year -- featured on The E.N.D. (Energy Never Dies), an album released that June. They quickly followed it up, issuing The Beginning the following year. Despite a boost from Oprah, who selected the album as one of The Oprah Winfrey Show's Favorite Things for 2010, as well as a Top Ten debut, The Beginning didn't sell nearly as many copies as the group's previous work.