Maybe President Obama wasn’t the biggest celebrity in London? At the end of a dinner thrown by Sarah Brown for the spouses of G-20 leaders, president Obama headed straight for Harry Potter author JK Rowling like some star-struck fan and told her how he'd read her books and read them to his daughters. However, Obama is apparently less of a fanboy than shameless Russian President Dmitry Medvedev, who asked for Rowling's autograph.
