By KATE HAMMER , Toronto Globe and Mail

The Boy Scouts of America motto, "Be prepared," typically means being able to tie complicated knots, build campfires, ward off bears and discriminate between edible and poisonous berries.
It does not apply to heart attacks, strokes or diabetic comas.

Second only to a Janet Jackson-type "wardrobe malfunction," it is the most unforgettable and unforgivable of fashion faux pas, the kind that makes Joan Rivers' claws come out: Wearing the same dress as another guest at a high-profile event.