Blondie performs their groundbreaking hit “Heart of Glass,” one of the most influential songs of the late 1970s and a defining track of the new wave era. Released in 1979 on their third studio album Parallel Lines, the song marked the band’s first major crossover success, blending rock, disco, and punk influences into a sleek, danceable sound. It became a global hit, reaching #1 on the Billboard Hot 100 and topping charts in several countries, including the UK and Canada. Written by Debbie Harry