Watched it few times, she's naturalUnlikely. But I wonder how much of her behavior is simply trying to be up for the camera. You know, being bubbly and energetic to keep her career going, maybe get some attention for another opportunity.
Not sure if all her gestures real
Hair obvious one, can make it, touching chest also easy one, but there are more details
You can see by Brad Pitt behavior, he just enjoys him self because he sees how she sees him