"Heartbreaker" is a song by American singer Pat Benatar from her debut studio album In the Heat of the Night (1979). 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 adjusted the original lyrics, as such references as "A to Zed" and "moonraker" would have likely confused American listeners."Heartbreaker" was the second single released off In the Heat of the Night after the first, "If You Think You Know How to Love Me", failed to reach the US Billboard Hot 100. A sleeper hit, "Heartbreaker" proved to be Benatar's breakthrough single, reaching number 23 on the U.S Billboard Hot 100 while spending four and a half months on the chart, the fourth longest of all of her singles. It was more popular on album-oriented rock stations as it peaked at number 13 on Tunecasters Rock Tracks chart in March 1980. The song peaked at number 16 in Canada and at number 14 in New Zealand, although it only reached number 95 in Australia.The song was named the 72nd best hard rock song of all time by VH1.