The main Disney Princesses to date are Snow White, Cinderella, Princess Aurora, Ariel, Princess Jasmine, Belle, Pocahontas, Mulan, Giselle, Tiana, and Rapunzel; Cinderella is actually nobility or gentry while Belle, Tiana, Mulan, and Giselle are actually commoners but the first two married into royalty, Giselle came close, and Mulan marries a general.
A fancy dress and tiara does not a princess make.
Real princesses, at least historically, have, with a few exceptions, enjoyed little political influence; their brother(s) usually inherit the property while they are married off as pawns in a big political game, existing only as managers of the castles and breeding-mares for their husbands, their freedom sacrificed for the dynasty and the people; Princess Jasmine represented this pressure. Not all princesses are beautiful or intelligent, let alone nice; because marriage below the nobility was forbidden, inbreeding ran rampant, and royals live a *very* public life, complete with prying eyes and intrigue.
Also applies to any such teenager or woman.