Wind Effect
I will be using this picture:
Now get out your freehand selection tool

and match your settings to mine:
Now using your selection tool, outline the outer part of Natalie's body. It doesn't have to be perfect!
Now go to
Effects > Distortion Effects > Wind
Set the wind strength to 100 going from the right.
Now press
CTRL D so the selection goes away and then go to
Layers > Duplicate and then set the duplicated layer to
Overlay.
And viola! You're all done!