smooth skin

how can i get my skin in my photos to look like this

http://i275.photobucket.com/albums/j...3f85286ff9.png

http://i275.photobucket.com/albums/j...f82c12328f.png

http://i275.photobucket.com/albums/j...fbc240b6ce.png

http://i275.photobucket.com/albums/j...d291b430db.png

You can get by working with multiple layers of the same image with a gaussian blur effect applied to each one of them and with a combination of different blend modes.
For example, 3 layers + original: gaussian blur = 10, blend modes = multiply, screen, overlay.