During an official visit to Korea... last year, I think.
Another outfit (and another new pair of shoes)
http://www.ppe-agency.com/500px/Mar2009/PPE09031628.jpg
http://www.ppe-agency.com/500px/Mar2009/PPE09031633.jpg
She wore this dress to the wedding of Felipe and Letizia. sorry, can't provide a photo.