Laura Branigan recorded the song for her sixth, self-titled album. Expatriate American singer Lory Bianco recorded the song for her album Lonely is the Night. The song's greatest success, however, would come when it was chosen to be the title track of Céline Dion's English debut album.
There were four club mixes created by Kevin Unger: single mix with rap, single mix without rap, mainstream extended mix, and club mix. Three of them feature rap by Frankie Fudge. They can be found on the Canadian editions of this single. The remixes took weeks of pre-production with the ultimate goal of making the original album version into a dance pop track for both contemporary radios and club dance floors. The new versions took 3 days to mix at Toronto's famed Metal Works Studios.
The music video was made in July 1990 for the single mix with rap and featured what many believed was an appearance by Frankie Fudge. However the person in the video was not Frankie Fudge. The video was included on the Unison VHS.
The song reached number 38 in Canada. "Unison" was more successful on the Canadian Contemporary Hit Radio chart where it peaked at number 27. In the clubs, "Unison" became a national hit, peaking at number 1 on Canada's National Club Chart for 7 weeks.
Argueably, the success of the remix single was the springboard Sony Music Canada needed to garner the attention of its U.S. parent company, leading to Dion's release in the U.S. market.
Canadian CD maxi single
Japanese CD maxi single
|Canadian Singles Chart||38|
|Canadian Contemporary Hit Radio Chart||27|
|Canadian National Club Chart||1|