One of my favorites is "The World of Henry Orient," about two high school girls who develop a crush on a pianist played by Peter Sellers. The recent "Southern Belles" was not a great film but it was a nice portrayal of a strong female friendship. It was a huge critical and box office failure, but "The Sweetest Thing" had some great girl bonding moments. And don't forget all of the movies about girls and women who are biological as well as psychic sisters, from the many versions of "Little Women" to "Crimes of the Heart" (okay, there's a murder in that one, but the women don't plot it).