A white tux would have been bad enough on its own, but Dion decided to add insult to injury by wearing it backwards.
It's so bad, we're almost tired of hearing how bad it is, but still have to call out Bjork's dying swan dress so that future generations of quirky actresses and songstresses learn from her mistake: one really (really, super) bad fashion choice can haunt you for the rest of your career. Thank you, Interwebs.