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This week, toofab is teaming up with Beauty Undercover to give away a product that'll keep your skin looking young!

The Knu Serum from Michael Todd Organics firms, lifts and tightens the skin, stimulating the natural production of collagen and elastin while reducing the appearance of uneven skin tone, fine lines and wrinkles.

The serum usually goes for $150 a bottle, but two lucky winners could get it for free by entering below!

To enter:

 1. Follow @toofab on Twitter and "Like" us on Facebook

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2. Fill out the entry form below.

Click here for official rules.

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