Elsewhere in this blog are details on singer, songwriter, actor Hoyt Axton who recorded "Sing in the Sunshine" on his 1965 album "Mr. Greenback Dollar Man". Recorded earlier as a single in 1963 with The Sherwood Singers, it had not been released on an album until then.
New Zealand's Gale Garnett hit the top ten with her "We'll Sing in the Sunshine" in 1964. She had composed the tune.