First, blazer and no hat:
Blazer, J Crew. Blouse, Love on a Hanger. Skirt, Cynthia Rowley. Shoes, thrifted. Earrings, No Boundaries. Necklace, heirloom. Bracelets, Charming Charlie and Deb. Rings, heirloom, thrifted, and gift. Hat (below), Charming Charlie.
Next, hat, no blazer.
I think the magic is all in the hat, though. Not the absence of a blazer.