Abraham Lincoln and Emma Watson have something in common. So do Eleanor Roosevelt and Christina Aguilera. They, like an estimated one third to one half of the population, are introverts or "loners" in common terms. While most celebs tend to gain their energy in social situations, these introvert celebs typically recharge through solitude and feel drained from too much stimulation. It might be easy to assume that those who gravitate toward the spotlight of fame are extroverts, but the truth is that many of our most prominent faces, past and present, have actually identified as introverts. Introverts are hardly a bunch of shy wallflowers - they are proven leaders who can make great public speakers. Don't believe us? Check out the list of 15 prominent introverts below. Keep in mind, too, that the famous faces listed below comprise just a drop in the bucket