Kelly Clarkson is an American songwriter, singer and performer. Heartbeat song comes form her leatest album called ‘Piece by Piece‘, released on January 12, 2015.
The song was written by herself, Mitch Hallan, Kara DioGuardi, Jason Evigan and Audra Mae. The scoring is done for piano, backup vocals and vocals in range of Gb3-Eb5. Original published key is Gb Major, but it was transposed also into +3 A Major, +4 Bb Major, +6 C Major, +8 D Major, -3 Eb Major, -1 F Major and +1 G Major.