Usually, when a celeb wears a lacy, see-through frock, they show off some sexy underthings.

Such was not the case with Fergie, who checked every box on the "What Not to Wear" list with this Jean Paul Gaultier disaster at the 2012 Grammys.

What's with the gigantic, sun-eclipsing black granny panties?

The Black Eyed Peas singer clearly has enough dough to shop at Agent Provocateur, or at least Victoria's Secret.

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