I believe that is Katherine Kayembe but it might be Joelle Kayembe.
Katherine is with:
Ice Models- Johannesburg
MGM Models- Hamburg
Confidence Models- London
Assuming the the Bon Prix, Bravissimo, and Venus pictures are all of the same model, it most likely Katherine because she models in Hamburg, London, and Miami where Joelle doesn't model in London anymore (to my knowledge). Although Venus books from Miami, they do book models from other countries. However, Bravissimo never books models who don't have an agency in England. So it makes sense its Katherine even though she rarely wears blue contacts where as Joelle usually does. My guess is they are both Katherine based on agencies and the fact she was in Miami last year and now based in London.