In High school musical (I dislike the movie!), Gabriella has wavy/curly hair. (She's not a princess, but it's disney)
In Tuck Everlasting (That movie freaked me out) the main character has kind of wavy hair.
I can't think of more
2c/3aNiiiN

Photos:
http://public.fotki.com/HerfstHaar/hair/