Some things to look out for: Front ref is with lowered jaw, side ref is with mostly closed jaw. Front shots have strong perspective. Might be you modeled that into your mesh. Your model lacks the back of the skull.
Nice start, there are a few issues I see holding back your work so far. I suggest trying to find as many reference images of her as possible. Photo shoots, paparazzi, performances, interviews, etc. I included a few bullet points as well as an image below to expand on a few issues. 1. The front of the face and bridge of the…