Cool (West Side Story song) Cool (West Side Story song) "Cool" is a song from the musical "West Side Story". Leonard Bernstein composed the music and Stephen Sondheim wrote the lyrics. This song is known for its fugal treatment of a jazz figure, described by one writer as "possibly the most complex instrumental music heard on Broadway to date". In 2011, actor Harry Shum Jr. performed the song, as his character Mike Chang from TV series "Glee", in the third episode of season 3, "Asian F" (aired on October 4). An episode of "Animaniacs" features a parody version as "Coo Bird" sung by Bobby of
Pets (song) radio play. No material was cut; the edit had virtually the same running length as the album version. Commercially, the song reached No. 67 on the US "Billboard" Hot 100, No. 1 on the "Billboard" Modern Rock Tracks chart and No. 53 on the UK Singles Chart. In Australia, "Pets" was the 33rd most popular radio hit on the Triple J Hottest 100 countdown for 1993. Most versions of the single included the previously unreleased non-album track "Tonight", recorded during the "Porno for Pyros" album sessions. "Tonight" is a cover of a song written by Leonard Bernstein and Stephen Sondheim