Duplicate your image (hit Ctrl-J) and go to Filter>Blur>Gaussian Blur. Fill in 6.1 for the radius and hit OK. By blurring this layer, we can make her skin smoother and brighter
Go to Image>Adjustments>Desaturate to turn this layer into a black-and-white image, this will greatly increase the contrast on the lady. Change the blending mode of this layer to Overlay. The Overlay mode just leaves bright and dark colors get through, so the colors are greatly enhanced.