Here is more detail:
Duplicate the layer
Apply Guss blur enough to lose all the detail (depending on the resolution of the image) on the top layer
Set the blending to Overlay or Softlight, then adjust the opacity of the top layer to your taste (usually below 50-40 percent)
Make a mask and uncover some of the underlying layer over the areas you like more detail (in this case I did for face and part of the shirt)
Voi la!