contains a tremolo effect on the guitar, set so that it vibrated in time with the song's rhythm. Near the end of the recording, the band had an idea of utilizing the tremolo effect with vocals. To achieve this, the voice microphone was plugged into an Ampeg guitar amplifier with tremolo turned on, and the output from the amplifier was recorded while James sang "Crimson and clover, over and over". Single release Tommy James made a rough mix of "Crimson and Clover" to show to Roulette Records executive Morris Levy for evaluation. The band was still intending to improve on the mix with ambient sound and echo. A few days later, James stopped at Chicago radio station WLS, where he had previously had a positive experience, to get their reaction. After an interview discussing the single, he was persuaded to play his copy of the rough mix off-air for WLS. Unbeknownst to James, the station recorded the song which they aired with little delay – in November 1968 – as a "world exclusive". Morris Levy had initially pleaded with WLS not to play the record prematurely, before its release, but listener response changed his mind. Roulette Records produced a specially pressed single and shipped it to listeners who called about the song. Eight hundred copies were also sent to WLS for promotional purposes. Levy refused to let James produce the final mix he wanted, and the single was released using the rough mix, with "Some Kind of Love" as its B-Side. "Crimson and Clover" entered the U.S. charts on December 14, where it stayed for 16 weeks on Billboard Hot 100 and 15 weeks on Cash Box Top 100. Following a performance of the song on The Ed Sullivan Show on January 26, it became number one on February 1, 1969, a position held for one week on Cash Box Top 100 and two weeks on both Billboard Hot 100 and Record World 100 Top Pops. Internationally, the song reached number one in Canada, Germany, New Zealand, Singapore, South Africa, and Switzerland. It also charted in Austria, Brazil, France, Holland, Italy, Israel, Malaysia, Mexico, Philippines, and Puerto Rico. Despite this, the song did not chart in the United Kingdom. Chart history Weekly charts Year-end charts All-time charts Legacy Album version Based on suggestions from radio stations, Tommy James and The Shondells chose to create a longer version of "Crimson and