Whether or not you like Celine, you do have to give credit to her for aiding in the popularity of the song and the movie. Sissel? Do you think radio stations would give much attention to a new song by a relative unknown? For better or worse, Deion gave attention to the song and got it tons (maybe too much) airplay. This, in turn, helped propel the movie's grosses. This has happened many times in the past where a hit song has benefitted a film (and vice versa where the film boosted the album sales).

By the way, I don't know if it is in this forum or another song discussion, but Sissel did _not_ write the background score. The score was by James Horner and the song lyrics by Will Jennings and in a recent list of the top selling soundtrack albums, "Titanic" was the only true score to make the top ten (the other nine were from song track films like "Saturday Night Fever" and "Flashdance".)