Hi!
When I was younger I saw that movie about two sisters and their mother who just got divorced. The older sister had brown hair an she owned a book of shadows or something and she was reading it for the whole time. The three if them then went to the seaside and there was an old witch living there... I don't remember anything else except that those sisters got lost in the sea and that witch found them because the older sister was singing some sort of witch song to get help...
Anyone knows what movie I'm talking about? :D