"Ah! Leah!" is a song by Mark Avsec and American rock musician Donnie Iris from the latter's 1980 album Back on the Streets. The song has been described as Iris's signature song, as well the unofficial anthem of the city of Pittsburgh and Western Pennsylvania as a whole. Eight musicians appeared in early live performances of the song, including lead singer Iris, a drummer, three guitar players, a keyboard player and at least two backing vocalists, one female and one male.