How did she learn to do that?

This morning I had Erika all dressed but then she told me that her pants were too tight and she was right. I kinda thought that they were. So we went upstairs to get her a different pair of pants. While up there I said to her "Mommy wants to get a quick picture of you." She proceeded to do various poses without any advice at all from me! I couldn't believe it! I don't know what to make of her creating all these poses...check them out...she is a cutie! What shocks me even more is that I have never taken her for professional pictures, so how would she know how to pose?