The Silk Building penthouse that Britney Spears once occupied is back on the market. Thanks to a new paint job and some kitchen renovations, it's now on the market for $6.595 million (or more than $2 million more that Spears sold it for). The best feature of the apartment? The long list of famous people who have lived there. In addition to a pre-Federline Brit, the pad has also been home to Russell Simmons and Keith Richards, which means there's about a 50 percent chance you'll go crazy or abuse drugs if you move in. More photos after the jump.