The Hippy Boys became one of Kingston's busiest session bands; fittingly their first recording was "Watch This Sound", backing the late Slim Smith. They also released a couple of albums for Lloyd Charmers, "Reggae with the Hippy Boys" and "Reggae Is Tight". As well as playing on many sessions for Bunny Lee and Sonia Pottinger, the Barrett brothers also played on two 1969 UK chart hits, "Liquidator" for Harry J, and "Return of Django" for Lee "Scratch" Perry, with whom they had now taken root.