That is a _beautiful_ portrait!!
Obviously beautiful; but will we ever see a sign over your studio, maybe in gold/yellow, professing "2-Billion Sold"? ;)
A one light setup was also used on my most 'interesting' photo on Flickr - I wrote about it (and gave credit to you) on my blog today. See http://wolfgang.lonien.de/2012/03/my-current-top-ten/ if you're interested.
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