I've been performing in an Irish Dance troupe for a few years and wanted my own twirly dress with sparkles and pleats. This is the solo dress I made for myself. The designs are based on the Turoe Stone in County Galway, Ireland. The dress can be seen in performance here: http://www.flyingirish.com/Appearances.htm
This is one of the first garments I made so there are lots of fixed mistakes, but it's ok, you can't see them from the audience. I dismantled a long skirt and a sheath dress for the body of the dress, keeping the neckline and zipper. I used a pattern to get the seams right over the bust. I wear this with a long sleeved shirt underneath.
I didn't make a dress diary, so instead I'm posting instructions and a model, which I hope will help you understand the construction.