I thought she didn't hit it? O.o; Oh well, I should get cracking on seeing the movie. But yeah, it's an E, as it has been..confirmed..oh so many times in this thread.
In the stage version, Christine's last note is indeed an E; in the movie, it's a semitone lower (Emmy Rossum sings a D-sharp/E-flat instead) because the movie eliminated the last verse of the song and the accompanying key change.