Senior Beauty Editor Celia Ellenberg's take:
Sometimes, a model can walk into a fitting and immediately embody the feeling of a designer's collection—so much so that they want the rest of the girls in the casting to look to just like her. It happened at Marc Jacobs last month and so it went today at Valentino. "We did the test on Maud [Welzen], and she's got this gorgeous flush, so we decided to mimic her complexion," Pat McGrath explained of the model that inspired Maria Grazia Chiuri and Pier Paolo Piccioli to keep girls looking "how they actually look" rather than do anything too over-the-top.
this is a nice little segment from style.com on the beauty idea for Valentino spring 2013 collection, and I guess Maud was the inspiration for the makeup!