"Heartbeat" is a song recorded by American singer and songwriter Carrie Underwood from her fifth studio album, Storyteller. It was written by Underwood, Ashley Gorley, and the song's producer, Zach Crowell. Country music singer Sam Hunt sings backing vocals on the track. The song was released to the radio by Arista Nashville on November 30, 2015 as the album's second single, after "Smoke Break". Musically, "Heartbeat" is a country pop and a R&B song with lyrics that relate to the feeling of intimacy experienced by being alone with one's lover. It appears to be inspired by Underwood's marriage to Mike Fisher.

"Heartbeat" was met with positive reviews from music critics and became a commercial success. It reached number one on the Billboard Country Airplay chart, becoming Underwood's fourteenth leader on the chart, widening her record for the most number-one's among women in the history of the chart. It also topped the Billboard Canada Country chart.

The song received its first televised performance on the twelfth season of The X Factor on November 29, 2015. Underwood has since performed the song live on television at the 2015 American Music Awards and at the 58th Grammy Awards (along with Hunt).

"Heartbeat" is a country pop and R&B song written by Carrie Underwood, Ashley Gorley, and Zach Crowell. It is a sentimental ballad composed in the key of B♭ minor and the sheet music designates a "slow" tempo of 140 BPM. The song alternates between "smooth" verses with a relatively low-key musical accompaniment and a "bombastic" chorus.Country music singer Sam Hunt, who is a frequent collaborator of Crowell's, sings backing vocals on the track, leading some publications to label the song a duet. Hunt provides background vocals on the chorus and bridge, with Underwood's vocals layered over top of his to creating a "warm... echo" effect.

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