Sweet Sixteen Princess by Meg Cabot

Mia is getting ready for her sweet sixteen, but she doesn't want an elaborate party, especially after what happened at last year's party. Grandmere has other ideas, however, and has decided that a reality TV special celebrating the royal event is just the publicity the Genovian tourism needs. A short quick addition to the Princess Diaries series that will appeal to fans of the series. While not required, it helps to have read the previous volumes in the series.