Insomnia is a song recorded by British dance group Faithless. Released as the band's second single, it became one of their most successful. It was released in 1995 and became a hit in Dance Charts while peaking at number 27 in the UK in 1995 and number 3 in 1996. The song also reached number 17 in the UK chart as a re-entry in 2005, illustrating the song's longevity. It was voted by Mixmag readers as the fifth greatest dance record of all time.