I heard they used solid gold composited ontop of the girl in order to animate the hair.
Lastly, before I go to sleep, you'd have a hard time animating something like this in flash with vectors and tweening, unless you want to rig up a skeleton and some basic collision.
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lips moving in 2 frames could be done better with flash

hell the hair is the only thing moving
if you had a big movie budget for this you would have something pretty amazing