<P> `` I 'm Gonna Sit Right Down and Write Myself a Letter '' is a 1935 popular song with music by Fred E. Ahlert and lyrics by Joe Young . It has been recorded many times , and has become a standard of the Great American Songbook . It was popularized by Fats Waller , who recorded it in 1935 at the height of his fame . </P>
who sang gon na sit right down and write myself a letter
Fats Waller