If I were to play princess for a day...

I would choose to wear Monique Lhullier's Stardust Embroidered 3/4 sleeve gown from her Ready to Wear, Spring 2011 collection. 

Gown via Monique Lhullier website.

Monique Lhullier's inspiration for this collection came to her while dreaming of a beautiful girl running in the Garden of Eden.  The sparkling sequins on the gown represent the sun gleaming off of the dress (from Monique's dream) and when combined with the feminine, playful fabrics makes a simply divine creation.  Pair this dress with the Dior rose ring below and I'm in heaven.

What would you wear?