Made in early 2014, before the official Frozen pattern existed (I'm still bitter about this!). I used Butterick 4131 for both my skirt and bodice, which are both made from casa satin from Joann's. I drafted the slit myself, and the skirt is lined. The bodice is embellished with sequins that I hand cut myself from 20mm rounds into rectangles (I purchased them from bergerbeads.net, in the dior blue color) and then had to punch a second hole in. They were all hand sewn on. My undershirt is a mesh shirt purchased from eBay.