"Bad" is a song by Irish rock band U2 and the seventh track on their 1984 album, "The Unforgettable Fire". Thematically, the song is about heroin addiction, though lead vocalist Bono has given varying accounts of who was the inspiration behind his lyrics. "Bad" is considered a fan favourite and is one of U2's most frequently performed songs in concert. The band's 12-minute performance of the song at the Live Aid charity concert in 1985 was a breakthrough moment for them.