A jewish girl should dress like a nice modest jewish girl, forget the princess tag!!!
Princesses all over the world were and are famous for wearing fashionable and revealing clothes, from today’s celebrity royals to many past royals in courts all over Europe. OOmis is quite right about wealthy and aristocratic women being figures of immodest fashion and allurement, they did not wear practical clothes to wear in the field or about the home, but clothes of status and privilege designed to highlight their bodies and give prestige to their men. These values are not ours!! Paintings, diaries and court accounts from many different periods all lavishly detail this, if you are not sure find portraits of Renaissance, Reformation, 17th, 18th, 19th as well as 20th and 21st century royalty. History and History of Art are my passion as well as profession, so believe me when it is always so funny to hear people talk of tzniut girls dressing like royalty!
Girls should indeed be encouraged to be modest, and to take pride and pleasure in their appearance, but to associate high class status from the gentile world with our moral stance is to create confusion and misunderstanding.