all i saw was that every scene she presented a transformation of the character, to the point that during multiple scenes, i found myself wondering "is that actually natalie portman?" and that i was noticing all these very poised and careful little nuances in her performance, such as when she collects herself and holds her purse at her waist in the bathroom before opening the door to lily, or when she is writhing in self-conscious pleasure while she is performing black swan during tchaikovsky's black swan coda, after she removes the veil from her face. all i could see was a completely represented, deliberate and careful and thoughtful, transformation of the character, from one stage to another to another, throughout the film, and all i could think was about what a magnificent transformation it represented from one class of actress to another. i honestly believe that is a true artist.