"Why Don't You Do Right?" is an American blues and jazz-influenced pop song (now a standard) written in 1936 by Kansas Joe McCoy and recorded by Peggy Lee. It is a twelve-bar minor-key blues form with a few chord substitutes. It is considered a classic "woman's blues" song.
The song was performed in the 1988 film, Who Framed Roger Rabbit by Jessica Rabbit at the Ink and Paint Club. Although Kathleen Turner provided the speaking voice for the character, the vocal performance of the song was performed by Amy Irving.
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