If your talking just about the pic with the girl on her back here's a way to get something like it.

Copy the background layer.

Go to Filter - Noise - Reduce Noise..this will make the skin very smooth.You will have to tweak the adjustment to suit

Get a soft edge brush and with the eraser tool set the opacity low and go over the face and hair so there is still detail there.

Create a new layer and set the blend to Colour.

Get the colour sampler tool and select a skin tone.

Get the brush tool and set the opacity low and start to paint onto the girl...do a few bits then set the foreground colour to white.

Again brush onto the girl..say legs etc and you will start to get the bright smooth highlight.

keep changing from the pink skin tone to white and playing with the brush..it takes time and patience but you will start to get the result.

As the background of the image was white they may have set the foreground and background colour to white and then went to

Filter - Distort - Diffuse Glow..this also smoothes things out but you need to play with it to get the right effect.

I can show you a few samples of something similar if you wish.

 

Eddie