"Heart of Glass" is a popular song by the American band Blondie, released in 1979. It blends elements of disco and punk rock, showcasing the band's versatility and innovative sound. The song's lyrics reflect themes of love and heartbreak, resonating with many listeners and contributing to its enduring popularity. The track became a massive hit, reaching the top of the charts in multiple countries. Its catchy melody and distinctive production helped define the sound of the late 1970s. Debbie Harry, the lead singer, delivered a memorable performance that solidified the song's place in music history.