Who needs 140 characters when a photo is said to be worth a 1,000 words? Ever since Ashton Kutcher (not so secretly) posted a photo of Demi Moore in her underwear -- err, bathing suit -- did we fully understand the power of celebrity photos on Twitter. Putting the camera in their own hands, everyone from Katy Perry to Paris Hilton and John Mayer have uploaded photos of exotic vacations, dentist visits and themselves (sometimes sans clothing.) TMI? Of course, but we love it. See our favorite celebrity TwitPics of 2009. >>