“One Heart” is taken from Canadian singer Celine Dion’s eight studio album of the same name. It was released on 16 June, 2003 by Epic Records and Columbia Records as the second single from the album. It was produced and written by Kara DioGuardi and John Shanks. The official music video was released on 22 June, 2003 and directed by Antti J.
Stephen Thomas Erlewine from “Allmusic” noted that “a catchy and sunny and among the best songs from her album”. “UK Mix” reviewed that “I never saw any song before like this one, completely different from her other tracks and she always sings in lower throughout the entire time”.
“One Heart” ranked at number 75 on the ARIA Singles Chart, at number 37 on the Belgian Flanders Singles Chart, at number 59 on the Canadian Hot 100, at number 78 on the Dutch Top 40 Chart, at number 56 on the European Hot 100 Singles Chart, at number 30 on the Irish Singles Chart, at number 34 on the Swedish Singles Chart, at number 71 on the Italian Singles Chart, at number 63 on the French Singles Chart, at number 36 on the Swiss Singles Chart and at number 27 on the UK Singles Chart.