Mel Gibson, 50 Cent, Tim Geithner, Richard Gere, and Christie Brinkley can’t sell their houses

As if celebrities didn't have enough problems--like paparazzi and wrinkles--along comes the housing bust to tarnish their silvery existence. a story by Laura Mann of Newsday. That's the tippy top of Christie's house, known as Tower Hill, in the photo. It's been on the market for $30 million ever since 2007. Don't feel too bad for the uptown girl, though. According to Newsday, she bought Tower Hill in the late 1990s for less than $3 million.