The Lacheys celebrate Simpson's new CD in Hollywood. Plus: Madonna, Heidi Klum, the Olsens and more

BACK IN THE SADDLE

Earlier, Madonna gets on her high horse while filming an appearance on the Late Show with David Letterman in New York City. It was the singer's first time in the saddle since she was thrown while riding in England this summer, breaking several bones. "I have a bit of excitement tainted with fear," she told Letterman on Thursday.