U2 is an Irish rock band featuring Bono on vocals, guitar and harmonica, The Edge on guitar, keyboards and vocals, Adam Clayton on bass, and Larry Mullen, Jr. on drums and vocals. U2 have been one of the most popular rock/vocal bands in the world since the 1980s. According to the RIAA, they have sold approximately 50.5 million albums in the U.S., had six #1 albums in the U.S. and are widely considered as one of the most successful groups of all time.