A Whitney-Mariah-Celine performance in 1992 would probably either cause a cure for AIDS or end the world in rapture
Mariah's meek ass would stand in the back. Celine and Whitney would try to out-belt each other. When the last note comes, Celine will start a second earlier to get a good grip on the note, then Whitney will overpower her, and Mariah will throw a quick whistle note out to make sure people remember that she's there.
