Here’s what you need to get it yourself.
1. Create an Alabaster Complexion.
If you don’t have naturally porcelain-perfect skin (and who does?), fake it with an anti-aging foundation that camouflages fine lines and ruddiness, leaving you with a complexion that looks like it was never touched by the sun. Try Peter Thomas Roth Un-Wrinkle Foundation , which uses light-diffusing particles to make skin look younger, but still sports a sheer, dewy formula.
For eyes like Evan’s, wear a gold shadow on the lid and the lower lashline, with a smokier bronze in the crease for definition. Smashbox Full Exposure Palette  contains matte and shimmer shades in gold, bronze, and brown. Line the upper lashline with black powder liner and finish the look with a lengthening mascara like Maybelline Lash Stiletto Voluptuous Mascara .
Plums and berry shades are hot right now, and Evan’s lips beautifully complements her skin tone and hair color (whether it’s hot to match your lipstick to your hat and your shirt is a different story...). Pick a deeply saturated shade like Make Up For Ever Rouge Artist Intense Lipstick in Satin BlackCurrant , and apply it with a lipstick brush to get that perfectly-defined pout.