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Justin Bieber shares a laugh with 'Late Show' host David Letterman on January 31, 2011
His Royal Biebness has been staying up past his bedtime this past week, making the late night TV rounds while promote his new film "Never Say Never." From chatting up Chelsea Handler (who calls him Dr. Bieber) to switching places with Jon Stewart, Justin Bieber is straight up keepin' us True Beliebers.
