Buzz up! Mischa Barton is the latest celebrity to pose nude for the cover of a major mainstream magazine. Just months after Jennifer Aniston famously bared all for GQ, Barton — who was born in London — appears naked on the cover of Cosmopolitan UK with the blaring cover line, “Your Body Rocks!” Barton’s...

A full-frontal, nude photo of a 20-year-old Madonna fetched $37,500 at auction Thursday, an apparent record auction price for a photograph of the superstar singer. An unnamed European buyer bought the picture, which had been expected to sell for up to $15,000, according to Christie’s auction house. Madonna,...