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The G-Clefs consisted of four brothers and a fifth member who was a childhood friend. They first began performing locally around 1952. They scored two Top 40 hits in the United States: their 1956 single "Ka-Ding-Dong", featuring Freddy Cannon on guitar, hit #24 on the Billboard Hot 100, and 1961's "I Understand (Just How You Feel)", which uses the melody from "Auld Lang Syne", reached #9. The latter track reached #17 in the UK Singles Chart in late 1961.
They continued to play locally in the Boston area into the 2000s.