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"Hey Boy Hey Girl" is a song by the British big beat duo the Chemical Brothers. The song contains a sample from "The Roof Is on Fire" by Rock Master Scott & the Dynamic Three. "Hey Boy Hey Girl" was released as the first single from the Chemical Brothers' third studio album, Surrender (1999), on 26 May 1999 in Japan and on 31 May in the United Kingdom. The song peaked at number three on the UK Singles Chart in June 1999 and remained on the chart for 10 weeks. It also reached the top 10 in Canada, Finland, Iceland, Ireland, New Zealand, Norway and Spain.