U2 is a rock band.
Bono . He is best known as the lead vocalist and primary lyricist of rock band U2 . How to Dismantle an Atomic Bomb is the eleventh studio album by Irish rock band U2 . Songs of Innocence is the thirteenth studio album by Irish rock band U2 . U2 . Initially rooted in post-punk , U2 's sound grew to incorporate influences from many genres of popular music , yet has maintained an anthemic sound built on Bono 's expressive vocals and the Edge 's effects-based guitar textures .