Listen to Gus: The Theatre Cat (Instrumental Backing Track) online. Gus: The Theatre Cat (Instrumental Backing Track) is an English language song and is sung by David Keith Jones. Gus: The Theatre Cat (Instrumental Backing Track), from the album Cats: Hear and Sing, was released in the year 2014. The duration of the song is 5:55. Download English songs online from JioSaavn.