By Marisa Laudadio
Our hats are off … to the slew of stars who stepped out in Louisville, Ky., on May 3 and 4 to celebrate the annual Kentucky Derby.
Sure, the weekend was technically about the horse race, but we've got to hand it to the hats — celebs like Miranda Lambert, Lauren Conrad, Tom Brady and more donned the finest feathers, flowers and fedoras they could find and made their milliners proud.
Even little Dannielynn Birkhead got in the spirit, dressing up as Mary Poppins on her way to the races , just like the movie (dad Larry Birkhead accompanied her in costume as Dick Van Dyke's character Bert).
Click on to see these celebs and more as they partied over Kentucky Derby weekend…
Miranda Lambert arrives at the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Lauren Conrad walks the Kentucky Derby red carpet in Louisville, Ky., on May 4, 2013.
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Krysten Ritter attends the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Kyrsten Ritter arrives at the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Larry Birkhead and daughter Dannielynn Birkhead attend the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Dannielynn Birkhead, dressed as Mary Poppins, attends the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Tom Brady attends the 2013 Barnstable-Brown Derby gala at Barnstable-Brown House in Louisville, Ky., on May 3, 2013.
Michael Turchin and Lance Bass attend the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Armie Hammer and wife Elizabeth Chambers walk the Kentucky Derby red carpet in Louisville, Ky., on May 4, 2013.
Model Coco Rocha walks the Kentucky Derby red carpet in Louisville, Ky., on May 4, 2013.
"Dallas" star Josh Henderson attends the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Luke Bryan and wife Caroline arrive at the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Jason Biggs and wife Jenny Mollen attend the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Jason Biggs and Jenny Mollen attend the 2013 Barnstable-Brown Derby gala at Barnstable-Brown House in Louisville, Ky., on May 3, 2013.
Joey Fatone attends the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
"Arrow" star Stephen Amell attends the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Jane Seymour arrives to attend the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Christian Siriano attends the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Valerie Harper attends the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Star Jones attends the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Darryl "D.M.C." McDaniels and Joey Fatone perform at the Barnstable-Brown Gala hosted by Grey Goose at Barnstable-Brown House in Louisville, Ky., on May 3, 2013.
Bob Guiney attends the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Jo Dee Messina attends the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Model Coco Rocha and tennis star Steffi Graf join together to judge the Longines Kentucky Oaks Fashion Contest in Louisville, Ky., on May 3, 2013.
Taylor Dayne attends the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Travis Tritt attends the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Kix Brooks attends the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Emilio Estevez attends the 139th Kentucky Derby at Churchill Downs in Louisville, Ky., on May 4, 2013.
Christa B. Allen attends the Maxim And Maker's 46 Fillies & Stallions hosted by Blackrock at Mellwood Arts & Entertainment Center in Louisville, Ky., on May 3, 2013