The Kentucky Derby is this weekend, which means one thing — amazing, over-the-top hats. Accordingly, we've rounded up five fantastic hats fit for the horse races. Whether you want a traditional oversize hat, a flirty fascinator, or a retro pillbox, we've got some great offerings that you need to get your hands on in today's Fab Flash. On Allison McNamara: H&M top, Elizabeth Cole necklace.