"Keep on the Sunny Side" - sung by Tin Cup. (Blenkhorn, Entwisle, the Carter Family)

Sung by the Montana group, Tin Cup in 2015
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. - Wikipedia