Move over "Movember."

If you follow Jenny McCarthy, Kelly Killoren Bensimon or La La Anthony on Twitter, you may have noticed that these lovely ladies have posted pictures of themselves sporting big yellow mustaches.

PHOTOS: Do these stars look better with facial hair?

No, facial hair isn't the latest beauty trend. The trio is participating in "Defember,” a movement created by Olay to raise money for breast cancer awareness, and you can help out too.

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Just take the pledge to de-fuzz your upper lip on Olay's Facebook page, and the brand will donate $1 to the National Breast Cancer Foundation (up to $50,000).

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