Please help me find a song!

[hafida]

I'm desperately looking for a song. I just can't remember the title or the group. All I know is that 3 or 4 black women sing it and there is also an orchestra playing in the videoclip. This videoclip tells the story of a women who's getting married to a guy she doesn't realy love. The man she does love is on his way to stop the wedding, and he just gets there in time!! It's an R&B song from the 90's. Please let me know!!