"I'm a Believer" is a song composed by Neil Diamond and recorded by the Monkees in 1966 with the lead vocals by Micky Dolenz. The single, produced by Jeff Barry, hit the number-one spot on the U.S. Billboard Hot 100 chart for the week ending December 31, 1966 and remained there for seven weeks,[1] becoming the last No. 1 hit of 1966 and the biggest-selling record for all of 1967. Billboard ranked the record as the No. 5 song for 1967.[2] Because of 1,051,280 advance orders, it went gold within two days of release.