The best- and worst-dressed celebrities at the Kentucky Derby

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The Lady Antebellum crew showed up in style.

The Kentucky Derby is a light-hearted affair, where celebrities are free to take some fashion risks.

Big and colorful hats are a huge part of the look - but not everybody can pull it off. It's not unusual to see some people go completely over the top.

Ahead, the best- and worst-dressed celebrities of the Kentucky Derby.