"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.[1] The music is marked "Brightly".[2] The song is most famous for its "You like tomato /təˈmeɪtə/ / And I like to-mah-to /təˈmɑːtə/" and other verses comparing their different regional dialects.