"I understand certain lighting and what not was involved."
Your question, as well as this comment suggests that you think lighting is much less important than post processing. Subsumed under your "what-not" characterization, is the major aspect of pro photography called makeup. Both lighting and makeup are, in fact, almost essential to achieving the overall look. Without these, and only relying on PP, you will have a much more difficult time achieving this look. In other words, exactly what Clare said in the 2nd paragraph of her post.
With respect to lighting, I suspect that the photographer used an on-axis beauty dish + a softbox (dialed down ~ 2 stops) to the photographer's left. The beauty dish is giving the overall shadowless look that it is so famous for (look at the lack of shadows in the orbits of the eyes), while the softbox restores just a hint of a shadow on the backdrop.
The porcelain PP effect will whiten the skin, however the texture it leaves will not look like the very fine makeup texture of theexamples you provided. This has to come from either makeup or synthesizing a suitable texture or stealing an appropriate skin texture from another face. Makeup is vastly simpler and more reproducible from shoot to shoot.
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