"Heart of Glass" is a song by the American new wave band Blondie, written by singer Debbie Harry and guitarist Chris Stein. Featured on the band's third studio album, Parallel Lines (1978), it was released as the album's third single in January 1979.
In December 2004, Rolling Stone ranked the song number 255 on its list of the 500 greatest songs of all time. It was ranked at number 259 when the list was updated in April 2010. Slant Magazine placed it at number 42 on their list of the greatest dance songs of all time and Pitchfork named it the 18th best song of the 1970s.
In 2018, "Heart of Glass" ranked at number 66 in the UK's official list of biggest selling singles of all-time with sales of 1.32 million copies.