I'm gonna definitely agree with everybody.. A very obvious case of Photoshopping. One way to tell is ou can see along her face line on the left (your left) where it's very sharp and the background is blurry, very unnatural.I actually think she looks prettier with her natural skin that's dewy and stuff..
I've always heard using the MAC Buffer brush, I think it's the 182?, where you "buff" your skin in circular motions when you set your foundation with a loose powder, will give you a flawless airbrushed look. Other than that, hire a good graphic designer to airbrush your face in pictures