Mary-Kate and Ashley learn a little more about life, love and ice cream floats in this great Sweet Sixteen story.

Mary-Kate has stars in her eyes! She's just spent a week on a film set with friends Tyler (who's really cute!) and Danielle and her Mum, Diana, who just happens to be a famous actress. Mary-Kate comes back with a new name - Mikki - and a whole new attitude. No more ice cream floats, it's got to be sparkling mineral water; and when it comes to shopping, only the very best will do!

Meanwhile, Ashley is trying to get together a play starring a bunch of four-year-olds; Mary-Kate thinks she knows best and muscles in on the lighting, the scriptwriting and the directing and annoys everyone so much, they threaten to pull out!

Mary-Kate is left alone with a bunch of little kids to direct, and finds out just what hard work Ashley put in on the play. But then Tyler turns up. Mary-Kate decides to tell him the truth about everything, including her love of ice cream floats and he likes her even more! Together they pull the play together, and `Mikki `decides that being plain old Mary-Kate is fabulous enough for her.