japanese horror movies is really scary. "The Ring", "Grudge", "One Missed Call". And there is one I think a thailand movie, "Shutter" http://www.imdb.com/title/tt0440803/
Sweeney Todd: The Demon Barber of Fleet Street (2007). I never thought I'll feel scary by watching movie with a song within. But it happened. It's a great movie.
Theres alot (The Ruins...Hills have eyes 2...The Exorcist ....Wrong Turn...Texas chainsaw massacre...etc)