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Never mind  ... I found it: http://argint-diavol.deviantart.com/art/Smile-172917581

Here's my take on it.  Note - I didn't pay a lot of attention to the cracks and scratches - I was much more concerned about colors and tones.  

I regard the main challenge in retouching this image as a classic example of mixed light sources - uncontrolled in color, brightness and contrast.  Effectively, this means that you are forced to make separate corrections to these quantities in the various areas in the image.  Also, the background exhibits not exactly the most wonderful bokeh, so I also smoothed that out a bit, straightened the image, and made a few other minor tweaks.

T