The dress is from Bettie Page, I only added the Crow Applique. It was very easy. After I cut out the design I used some stitch witchery (made sure none stuck out the edges of the design) and ironed it down to hold it in place. Then I used the zig-zag stitch around the edges to attach the crow.
The hardest part was cutting out the design. I drew a paper template of the crow first, but the fabric was still so thin and stretchy that some had to basically be cut free-hand.