I've been one to appreciate that Michelle often wearing dresses has had a positive impact on women and girls. It's nice to see girls want to look feminine. It's also nice for heavy set girls to see in Michelle that they can do better than just put on spandex blend pants.
If that dress becomes a fashion statement, it will be better for prom night and other dress-up choices than choosing to look like streetwalkers in training. It sends the message that fashion can be fun.
The one who I'll criticize for clothing choices is hillary. She doesn't even try to make a fashion statement or look attractive.