Here you have them, in decsending order. Some of them are odd choices and may not be popular, but I enjoyed them none-the-less. Enjoy!
25-The Birds (1963)
24- 28 Days Later... (2002)
23- Se7en (1995)
22- Misery (1990)
21- Dracula (1931)
20- A Nightmare on Elm Street (1984)
19- Friday the 13th (1980)
18- Freaks (1932)
17- The Exorcism of Emily Rose (2005)
16- The Omen (1976)
15- The Orphanage (2007)
14- The Cabinet of Dr. Caligari (1920)
13- Frankenstein (1932)
12- Alien (1979)
11- The Blair Witch Prject (1999)
10- Night of the Living Dead (1968)
9- Event Horizon (1997)
8- 30 Days of Night (2007)
7- The Changeling (1980)
6- Bride of Frankenstein (1935)
5- Jaws (1975)
4- Silence of the Lambs (1991)
3- The Shining (1980)
2- Halloween (1978)
1- Psycho (1960)
What do you think? Any changes? What did I miss?