Former Pussycat Doll Nicole Scherginzer is used to showing some skin ... but today in London, she revealed a little more than she probably wanted to!

The "X Factor UK" judge looked amazing in a black gown, showing off her legs with a high slit. But it wasn't her gams that have everyone talking -- it was her chest.

The second the flashes started going off on the red carpet for the National Television Awards, her black dress immediately became see-through.

The jury's out on whether she showed full nipple or just a large pastie, but either way we're guessing it probably wasn't intentional. You can see the uncensored photo over at The Huffington Post.

Nicole isn't the only star (or even the only Pussycat Doll) to show too much on the red carpet. See more celebrity wardrobe malfunctions in the gallery above!

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