"AA UU" is the fourth single by Titãs, released in 1986. Most of this song consists simply of Sérgio Britto screaming "AA", while the other vocalists answer "UU". The band Símios made a cover of this song. The song was featured on the Rede GlobotelenovelaHiper Tensão. A song they already played in shows before working on the album, it was the first track to be recorded for Cabeça Dinossauro.