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Debuted #72 week-ending November 13, 1965, “Fever” peaks at #7 (2 weeks) on the Hot 100, week-ending, December 25, 1965. Having charted 11 weeks overall — on its final week on Billboard, the single drops out at #41 for the week-ending, January 22, 1966.
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Source: The Billboard Hot 100 Pop Singles Charts [1966]