I used Kwik Sew 2918, size T2 with added length in the sleeves. The butterfly is an iron-on applique that I purchased. I haven't used one of those recently, so I'm curious to see how it looks after cycling through the laundry.
The hems are finished with the ruffling technique I described here.
I picked up her pants at Old Navy for less than $2.00 on clearance and they have a pink zipper! I thought it was just me that did that when I didn't want to go get the "right" color!