Future Quicksilver Messenger Service lead singer Dino Valenti (real name: Chet Powers) wrote and recorded Let's Get Together in January 1964. The recording remained unreleased until 2011 when it appeared on the CD Get Together: The Lost Recordings. The song, also known as Get Together, has been recorded by more than 100 artists including Jack Jones, Hamilton Camp, Ed Ames, Della Reese, Belinda Carlisle, Lobo, Anne Murray, Ray Stevens, Judy Collins, Jefferson Airplane, Big Mountain, Liquid Blue, the Carpenters, the Kingston Trio, the Dave Clark Five, the Indigo Girls, the Staple Singers and the Mike Curb Congregation.
The biggest version of the song is by the Youngbloods, a folk-rock quartet led by Jesse Colin Young. This reached #62 on the Hot 100 in October 1967. In 1969, after the National Conference of Christians & Jews featured the song in a series of public-service TV commercials, it was re-released and got to #5 in September.