Every year before the holidays begin, Oprah Winfrey does a show called "Oprah's Favorite Things.'' You've probably seen the show—it's the one that drives the audience to scream with glee as Oprah reveals and gives away her must-have gifts.
After Oprah told the world that all she uses on her skin is a specific cream, sales of this product immediately revolutionized the brand. Apparently Oprah's endorsement has so much staying power that the product has become a long-term best-seller. The CEO of the company calls it the Oprah Effect. Can you guess this famous face cream?