Polka Dot Dress

I am really liking this style of dress lately. Can't afford this specific one at all (it's like $150!! No way, Jose), but it's super cute. I found it on Pinterest (blog about that on the way shortly) and am in love with the ruffles, the tie, the polka dots, and even the gray/white combo.
Tried one on like it at Old Navy yesterday that was blue and flowery, and I really liked it. However, I did