I know a movie that might be perfect for your daughter's sleep-over.Given the fact that your daughter is into the occult and likes to be scared by a movie, see if you can find "The Witches" with Angelica Houston.It"s a great movie about contemporary witches in England, one of whom wants to turn all of the children in the country into mice.It's based on a Roald Dahl story and it is funny and scary at the same time.This one is rated PG but I think it is fine for a 10 year old (it might frighten a much younger child).If you want to know more about it go to:
http://amazon.com and under search videos enter the The Witches.They have several reviews to guide you.I personally loved this one.
There are also the old favorites like
The Princess Bride (Very Good)
E.T. (terrific)
Big
Babe
Homeward Bound
The Sound Of Music
Maybe you can convince your daughter to buy a lot of wild shades of nail polish and some inexpensive makeup stuff and let everybody doll themselves up (that is how we "big girls" cast our spells after all).
Tell your daughter that Auntie Chelseabelle doesn't think that The Exorcist sets the right tone for a birthday celebration 