Copenhagen's star power got a big boost today with the arrival of Michelle Obama and Oprah Winfrey, in town to push Chicago's bid for the Games. Oprah was greeted with "bad weather for hair" and a throng of fans crying "Oprah! Oprah!" as she walked the streets, notes the Chicago Tribune, which offers a bit of Olympic trivia: The first lady's childhood idol was gymnast Nadia Comaneci. Check out photos of their visit to the left.