Another Sunshine Song. Open Up Your Heart And Let The Sunshine In. A Facebook friend asked about the song. I looked it up and slightly remembered it. Once I started playing it, I did remember singing it back in the good old days! Thank You for the memory. I hope you enjoy singing along and feeling a bit of sunshine! This was written by Stuart Hamblen in 1953 and released it in an album in 1956, “It Is No Secret.” When he was 18 years old, Stuart took a job on KAYO-AM radio in Abilene, Texas, becoming radio’s first “singing” cowboy. He went on to write many songs including “This Ole House”.