Listen to I'm Building Up to an Awful Letdown online. I'm Building Up to an Awful Letdown is an English language song and is sung by Red Mckenzie and Bunny Berigan. I'm Building Up to an Awful Letdown, from the album Bunny Berigan & Red McKenzie - Asia Edition: Indiana, was released in the year 2017. The duration of the song is 3:20. Download English songs online from JioSaavn.