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Britney Spears glammed up for an "X Factor" party in Los Angeles last night, but her Toxic tootsies let her down.

The singer sizzled on the red carpet in a little black dress that clung to her curves.

But Britney's sky high strappy heels drew attention to a big patch of dry scaly skin on her ankle.

The 30-year-old has a busy schedule judging and mentoring acts the show, but surely she can find time to take care of her trotters.

Brit didn't let her ankle catastrophe ruin her night.

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The pop princess was in celebratory mood after a court threw out her former manager's lawsuit against the Spears family.

Go to The Sun for more on Britney's upcoming ... book project?