will.i.am: Britney, to me, is an icon. She's one of the last major icons that the music industry has launched. There are big acts, believe me there are, but for our generation, she's unstoppable. Britney can fill stadiums, and I don't want to compare her to another artist like Madonna, but she's our generation's Madonna in terms of the way that she changes as an artist, yet stays true to the Britney we love. The [Black-Eyed] Peas, started out as an underground group, and by that time Britney was already huge. I became a lifetime fan of hers after "Toxic," so to get a chance to work with her again was just amazing.