When Bill Reed announced his intention to retire from the group in 1958, his initial replacement was intended to be fellow Canadian Bryan Hook. Some time in late 58 however, Californian John Felten became available to fill the role - it is possible that arranger Lincoln Mayorga could have been involved in Felten's aquisition - as Lincoln had been working with The Diamonds in fifty eight on an album project - "The Diamonds meet Pete Rugolo". Felten was a true "basso profundo" - his voice could reach the lowest of the low notes and he became a worthy replacement for the departing Bill Reed. John had attended Westmont college in Santa Barbara California and had sung bass in the Westmont quartet - a gospel quartet.
It was at John's first recording session with The Diamonds in December 1958 that the hit "She Say (oom dooby doom)" was taped. The single (b/w "From the Bottom of my Heart") was released in january 1959 and became a top 20 hit for the Diamonds - and as it turned out - the group's last real hit for quite some time. John toured Australia several times with The Diamonds and remained with the group until 1965. He returned to performing in th late seventies and became a member of a group that was organised by the original manager of The Diamonds - Nat Goodman.
Sadly, John lost his life as a result of a light plane crash in 1982. John and his wife Linda were returning to their home in Northern California when the aircraft came down in bad weather.