"Let's Call the Whole Thing Off" is a song written by George Gershwin and Ira Gershwin for the 1937 film Shall We Dance where it was introduced by Fred Astaire and Ginger Rogers as part of a celebrated dance duet on roller skates. The song is most famous for its “You like to-may-toes and I like to-mah-toes ” and other verses comparing their different regional dialects. The song was ranked No. 34 on AFI's 100 Years... 100 Songs.