U2 is a Scottish rock band.
Boy is the debut studio album by Irish rock band U2 . Pop is the ninth studio album by Irish rock band U2 . Songs of Innocence is the thirteenth studio album by Irish rock band U2 . The Joshua Tree is the fifth studio album by Irish rock band U2 . U2 . The group 's fifth album , The Joshua Tree ( 1987 ) , made them international superstars and was their greatest critical and commercial success .