It's the first time we see the Princess of Asturias with so many jewels. Her earrings are absolutely gorgeous and her necklace is also very beautiful and, above all, it is not overdone. Letizia is being very smart on not exaggerating the use of jewels; she has a very balanced princess-like look, and she completely avoids the "Christmas tree look".
Definitely very smart the recycling of her gala dresses too. She had already recycled the red skirt from the Danish pre-wedding concert, combining it with a different top, to the gala in honour of the Peruvian president. Now she's slightly changed the top of her own pre-wedding dinner dress, but I’m not sure if it was a good choice. I think the dress should remain as some kind of museum piece of art. It was a gorgeous dress for a bride, and I think it should remain like that... though she's well rationalizing the resources, and so following her mother-in-law's steps, who also always recycles her dresses a lot.
I wish I can see, some day, Letizia in a gala black dress. I simply loved the lace outfit she used in her visit to Hungary. She's proved to be very flattered in strong colours, as red, black or even white. I'm not a particular fan of neutral colours...