An iconic child (now teen) star performs a pole dance at an awards show aimed at teens. Most of the media shrug. Welcome to Hollywood 2009. At the Teen Choice Awards, which took place Aug. 9 and aired Aug. 10 on Fox, Miley Cyrus, the 16-year-old Disney-created star of the wildly popular “Hannah Montana,” franchise performed “Party in the U.S.A.” Clad in short-shorts, high-heeled boots and a tank top that revealed a black bra, Cyrus danced around a pole affixed to the top of an ice cream cart. Admittedly, the pole moves were a small portion of her performance, but...