A.M.
Ugh! That's horrible! How do you feel about working with her actively on her sleep - setting a sleep schedule, enforcing it, etc? I did that with my son. He's also 9 months old. Now, he goes to bed at 7 pm without fussing, and sleeps straight through until 6 am. When he teethes, he wakes up too, but never more than once per night. I am NOT trying to brag or make you feel bad - please know that he was NOT always a good sleeper. He used to get up constantly, and I had to work with him pretty hard on this. But he's a much happier, more cheerful baby when he's awake now that he's getting good sleep at night. He's just learned that nighttime is for sleeping and daytime is for playing.
The book that I used was Healthy Sleep Habits, Happy Child by Weissbluth. He describes several ways to go about sleep training, including some that don't involve crying (though he says these are less effective and take longer). Take a look at it and see what you think.