Here's the dress paired with the Karen Cardigan from Burdastyle.com. Its too big, I'm going to do the non-plus size next time.
What I do like about the Karen Cardigan is that you can belt it with things other than the tie the instructions have you make. I think it makes the dress much more playful, and also gives me the ability to wear it in colder weather.
For those of you that grew up with Animaniacs, you probably can't hear about PolkaDots without thinking of this episode. Oh you don't? Well now you will! Stay fabulous!