Listen to (We're Gonna Hang Out) the Washing On the Siegfried Line online. (We're Gonna Hang Out) the Washing On the Siegfried Line is an English language song and is sung by Flanagan and Allen. (We're Gonna Hang Out) the Washing On the Siegfried Line, from the album 101 Hits Of The Thirties, was released in the year 2011. The duration of the song is 2:45. Download English songs online from JioSaavn.