There were a few steps taken, first i scrapped the first edit and went to back to basics. The sky looked great but the dress was quite dark so i pushed the fill light on Lightroom to 100, then i boosted the blacks until i got the contrast I was looking for.
I had a few colour issues so i adjusted the saturation in the orange, yellow, green and blue sliders under the HSL section. I had to drop the yellow saturation quite a bit to get the dress to come out more or less white. The beauty of HSL is you can tweek only a specific range of tones. In this case there were some yellow tinges in the dress i didn't like so take the yellow saturation down in the HSL solved this problem.
Then it was looking better but the balance of the dress to everything else wasn't right. I took an adjustment brush and darkened the sky because the fill light brightend it more than I wanted. With the same adjustment brush i boosted the saturation a little to pop the sky. Make sure you click auto mask! It is a life saver of time.
A few other minor tweeks and it was finished. I am much happier with the second result, again I have no idea what I was thinking on the first one.
