Cidadão Quem is a Brazilian rock band formed in the late 80s in the city of Porto Alegre. Originally, it was formed by Cau Hafner (drums), Duca Leindecker (Lead Vocal and Guitars/Keyboard) and Luciano Leindecker (Bass). The name Cidadão Quem refers to Orson Wells movie Citizen Kane and literally translates to "Citizen Who". In 1991, the band made it to the finals to Rock in Rio 2. First cd was released on 1993, called Outras Caras, and sold more then twenty thousand copies.