Sucker Punch actress, Emily Browning does a highly emotional cover of the Smith's Asleep.
The song is purely her vocal. For an actress, she has a haunting voice that would make Morrissey proud. She also does a great Eurythmic cover on the soundtrack as well.
Asleep (sucker punch cover) found on the Sucker Punch soundtrack.
The soundtrack was way better than the movie.
Sucker Punch Soundtrack on iTunes