Keep on the Sunny Side, also known as Keep on the Sunny Side of Life, is a popular American song originally written in 1899 by Ada Blenkhorn (1858–1927) with music by J. Howard Entwisle (1866–1903). The song was popularized in a 1928 recording by the Carter Family. A recording of the song with The Whites was featured in the 2000 movie O Brother, Where Art Thou?.
A variant, "Stay on the Sunny Side", is sometimes sung as a campfire song. It features only the chorus, with some altered lyrics ("You'll feel no pain as we drive you insane"), with knock-knock jokes being told between choruses.[1]