"One Heart" is a song recorded by Canadian singer Celine Dion, for her eight English studio album, One Heart (2003). It was written and produced by John Shanks and Kara DioGuardi. "One Heart" is a dance-pop song, about the power of love. It was released on 16 June 2003 as the second single outside North America, while in Canada, it was released as the third single after "Have You Ever Been in Love". "One Heart" became a top 40 single in most European countries, including number 27 in the United Kingdom.