It's time to put on a show in this super new Sweet Sixteen story! Mary-Kate and Ashley are working on a high school concert. There's just a chance they can pull the hottest DJ in town to really make things rock. Mary-Kate and Ashley are on a mission! They want to get hot DJ Wild Will to attend the high school concert they're working on, so he'll hear their friends Brian and Penny perform. He'll be so blown away, he'll be sure to play their records on the radio and make them famous. But Brian is Ashley's ex, and she still has feelings for him... Meanwhile Mary-Kate is desperately trying to drum up enough cast members to stage a production of the show 'Grease' - but her lead actress refuses to perform, and that's just the beginning of her problems. That's showbusiness!