[Demonskid]

Belle wasn't originally a princess.. she was a daughter of a villager (forgot what he does) but fell in love with the prince (the beast) there for referred as Princess Belle

um.. Cinderella wasn't a princess either.. similar story except her step family used her as a slave.. prince falls for her and wala! she's a princess now.. (the second movie SUCKED D<)

Ariel.. already explained..

Jasmine.. princess of the arabian people..

Who else is there..

Snow White - Princess but treated horridly!