As grandmothers would say: Teens are no longer what they used to be! And we could agree with that only by looking at 16 years old Miley Cyrus's dance routine at the Teen Choice Awards in Universal City last night.She was far from being an innocent girl of her age. Actually she was looking older during her performance, but that doesn't mean she is not still a minor. The singer/actress wore a mini-shorts and black leather boots. While singing