"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.

The song is featured as downloadable content for the music video game series Rock Band,[5] and is a playable song for the game Guitar Hero World Tour.

Former American Idol finalist Allison Iraheta regularly covers the song as part of her set on the Glam Nation Tour.