Does star-endorsed Proactiv work?

November 14, 2011 12:00:00 AM PST
Americans spend almost $400 million a year on over-the counter acne treatments. No doubt you've seen the star-studded ads for Proactiv. Justin Bieber is not the only young celebrity pushing the product. Avril Lavigne, Julianne Hough, and Katy Perry all are singing its praises.

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