To those recommending facebook, I disagree.  She isn't a friend of yours. You interviewed her for a job.  Contacting her in a very personal way through searching her on the net and posting on her "friends" page is a violation of her privacy and an abuse of your authority at work.

Please, just leave well enough alone. 

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi