This shot was using side light. The touching hair pose is also a basic pose for model. You could know this was a side light from shadow at her right eye and left cheek.

This side light was using a soft Box. It creates shadow on left cheek and neck area.

This shot was using front light. This basic pose is common among models.

This shot was using side top light. It gives shadows on several areas on the face. I think this kind of light gives a mysterious impression.