"Heartbeat" is a rockabilly song originally recorded by Bob Montgomery and credited to Norman Petty.

The B-side of the single was "Well... All Right" (Buddy Holly, Norman Petty, Jerry Allison, Joe Mauldin).

It was a minor hit in the United States, reaching number 82 on the Billboard Hot 100 chart.

Holly's single had more chart impact in the United Kingdom, reaching number 30 in January 1959 and again upon its reissue in April 1960.

[4] Tommy Allsup played the lead guitar part on the recording.