Humpy Bong were an English folk rock band formed in London in 1970 by former Bee Gees drummer Colin Petersen and Irish folk rock singer Jonathan Kelly.
Colin Petersen, a former child actor in Australia and drummer with the Bee Gees. Petersen said, "I knew when I saw and heard him that this was a talent which should be encouraged and developed". Colin became his record producer and Colin's wife Joanne became his personal manager. Jonathan Kelly was playing in a restaurant in London one night in 1969 when in walked Colin. Kelly released a single in 1969 called "Denver", and another single in February 1970 called "Make A Stranger Your Friend", an anti-war song. This song had a catchy chorus and Jonathan's talents were recognised by many people in show business if not yet by the record buying public at large. A choir was formed to sing the chorus, amongst those who turned up to join in were Mick Taylor from The Rolling Stones, Klaus Voorman, Madeline Bell, Carl Wayne, Peter Sellers and Spike Milligan. Robin Gibb also attended the session but was contractually prevented from singing. Jonathan Kelly's next single in 1970 was "Don't You Believe It", a very sought after single because Eric Clapton was invited to play slide guitar on the track.