Victoria the thrifty recycler

You've probably noticed by now what CP Victoria wore to the Lux wedding this weekend: her 2010 nobel prize dress and her YSL sandal heels.

Vikkan at the Luxemburg wedding this weekend. Wearing her 2010 Nobel Prize dress.

The famous YSL sandals

What I want to know on the other hand is what in the gods name is she wearing on her head? I can't decide wether I'm a fan or not. What are your thoughts?