Sew Kansas: Corset Back Dress. This is a nice tutorial on how to alter a dress by adding corseting. As the pinner says, adds a few precious inches where needed. I did something similar to my wedding dress for my daughter.
Best Sewing Projects to Make For Girls - Easy DIY Phone Charger Holder - Creative Sewing Tutorials for Baby Kids and Teens - Free Patterns and Step by Step Tutorials for Dresses, Blouses, Shirts, Pant (Easy Diy Bag)