i found this one on the instyle website, but i dont think this is the one your looking for, ill keep looking...
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Carrie Bradshaw: The fact is, sometimes it's really hard to walk in a single woman's shoes. That's why we need really special ones now and then to make the walk a little more fun.
I tried looking for you. I have the InStyle and was looking in the back to see if they had any info, no luck. I believe its a candid photo of her (not taken for the article), so its going to be tough to find it. Sorry.