Harley Quinn Rockabilly Dress

I saw ~ta-min wearing a 50s inspired Harley Quinn costume. I've seen sketches of this before, and love the idea, so I tried to create a design based on Harley. Harley is a lot of fun: I think she'd like the 50s (provided that Mr J is there too).
I am considering sewing a dress based on this design and perhaps making them to order on etsy. I'll have to see about that, because if my design is too similar to someone else's I will have to change it a little.