Formed in the early '60s, Los Angeles RandB quintet the 5th Dimension first appeared as the Hi-Fi's before changing their name in 1966 to better reflect the changing landscape of popular music. Their interpretations of some of the era's popular hits as well as songs by more obscure writers were radio mainstays in the late '60s and early '70s. This Playlist collection from Sony Legacy offers up most of their highest-charting and best-known singles like "Up, Up and Away," "Stoned Soul Picnic," and their chart-topping version of "Aquarius/Let the Sunshine In" from the musical Hair. Working in multiple styles, these performances show just how versatile and dynamic the 5th Dimension were.