I bought Z a Tinkerbell costume from Disney Outlet as she's pretty much outgrown the Sleeping Beauty gown we got her for Halloween last year (a dress she's worn at least once a week since!). I chose Tink because a) she likes Peter Pan and b) it was available in her size.
Little did I know the Disney Corporation is angling to make Tinkerbell the new Cinderella--star of her own movie and leader of the soon-to-be-huge Fairies Franchise (for girls who've outgrown the Princesses but aren't yet ready for Hannah Montana and her ilk). Yikes!