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Sarah Palin and Justin Bieber top Barbara Walters' 10 Most Fascinating People list (along with Jennifer Lopez, Prince William's fiancee Kate Middleton, the cast of Jersey Shore, Betty White, Sandra Bullock and NBA star LeBron James), and two more famous faces will be revealed when the ABC News special airs December 9 at 10pm EST. Our guesses? Lady Gaga and President Obama...or maybe Oprah?

Just an hour before her special, Walters is hosting Oprah, The Next Chapter, which is an in-depth visit with Winfrey as she prepares to launch OWN this January. Should be an interesting show!