Listen to I'm Gonna Sit Right Down and Write Myself a Letter online. I'm Gonna Sit Right Down and Write Myself a Letter is an English language song and is sung by Frank Sinatra. I'm Gonna Sit Right Down and Write Myself a Letter, from the album 100 Jazz Essential Masterpieces (Frank Sinatra, Louis Armstrong, Nina Simone, Billie Holiday and Other Legends), was released in the year 2012. The duration of the song is 2:28. Download English songs online from JioSaavn.