"Heartbreaker" is a song by American singer Pat Benatar. Released in 1979 as the third single from her debut studio album In the Heat of the Night. Written and composed by Geoff Gill and Cliff Wade, the song had first been recorded by English singer Jenny Darren on her 1978 album "Queen of Fools" and Benatar made adjustments in the original lyrics as such references as "A to Zed" and "moonraker" which would have likely confused American listeners. "Heartbreaker" proved to be Benatar's breakthrough single, reaching #23 on the U.S. Billboard Hot 100 and #19 on the Cash Box Top 100. In Canada, the song peaked at number 16.