One more small piece of evidence. She doesn't normally wear a necklace like that (a goldish, rounded medalion.) Yeah, so what, right? But jewlery tends to be pretty particular for girls & it's not something guys usually fake... and it's also hard to do correctly.
In one of the galleries where she has the freshly streaked hair, the same as these potential nudes, she's also wearing a similar necklace:
http://galleries3.petiteteenager.com/1/emilycometomyprom/7.jpg
So I'm thinking these are the real deal.