Mary-Kate and Ashley are planning the best Sweet Sixteen party of all time Mary-Kate and Ashley hit the road in their new car, a Sweet Sixteen present from their parents They are going to work at a rock festival for the summer. But working as a pizza waitress and a roadie isn’ t quite what they had in mind When Ashley makes friends with a famous rock star, things get interesting. But is he interested in her, or in her music business father? And can Mary-Kate and Ashley help their friend Penny to overcome her stage fright and get a recording contract?