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A Kentucky Derby fan displays a hat during morning work outs at Churchill Downs. Mark Zerof/USA Today Sports

American Pharoah won the 141st Kentucky Derby Saturday at Churchill Downs in Louisville, Kentucky, marking the 3-year-old colt's fourth straight victory. Jockey Victor Espinosa won his second straight Derby and third of his career.

The Kentucky Derby has long been a showcase for world-class thoroughbreds, but it’s also a headware fashion show, that includes some of the world's most elaborate hats.

Here's a glimpse at some of the most fashionable hats at Churchill Downs this weekend, along with 141st Kentucky Derby winner American Pharoah.

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A view of the roses in the winners circle before the 141st Kentucky Derby at Churchill Downs. Jamie Rhodes, USA Today Sports
red hat
A Kentucky Derby fan displays a hat during morning workouts at Churchill Downs. Mark Zerof, USA Today Sports
pink hat
Lauren Vonlast of St. Louis, Missouri, and Jacquelyn Morten of Louisville, Kentucky, look at a race program before 141st Kentucky Derby at Churchill Downs. Peter Casey, USA Today Sports
white hat
Mercedes Cox buys a mint julep before 141st Kentucky Derby at Churchill Downs. Jamie Rhodes, USA Today Sports
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Emily Hicks wears a traditional hat before the 141st Kentucky Oaks at Churchill Downs. Mark Zerof/USA Today Sports
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Shimel Hayden reacts to a stakes race before 141st Kentucky Derby at Churchill Downs. Jamie Rhodes/USA Today Sports
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Patrons have a drink wearing traditional hats before the 141st Kentucky Oaks at Churchill Downs. Jamie Rhodes/USA Today Sports
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People move through the concourse before 141st Kentucky Derby at Churchill Downs. Jamie Rhodes/USA Today Sports
cowboy hat
Patrons dance in the infield before the 141st Kentucky Derby at Churchill Downs. Jamie Rhodes, USA Today Sports
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Michael Bullock dances in the infield before the 141st Kentucky Derby at Churchill Downs. Jamie Rhodes, USA Today Sports
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Keith Phillips makes a "$1,000 Mint Julep" before 141st Kentucky Derby at Churchill Downs. Jamie Rhodes, USA Today Sports
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A view of mint juleps before the 141st Kentucky Derby at Churchill Downs. Jamie Rhodes, USA Today Sports
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American Pharoah No. 18, ridden by Victor Espinoza, races Firing Line No. 10, ridden by Gary Stevens, out of turn 4 during the 141st running of the Kentucky Derby at Churchill Downs on May 2, 2015, in Louisville, Kentucky. Andy Lyons/Getty Images
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Jockey Victor Espinoza celebrates as he guides American Pharoah No. 18 after crossing the finish line to win the 141st running of the Kentucky Derby at Churchill Downs on May 2, 2015, in Louisville, Kentucky. Rob Carr/Getty Images
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Victor Espinoza aboard American Pharoah passes Gary L. Stevens aboard Firing Line during the 141st Kentucky Derby at Churchill Downs. Brian Spurlock/USA Today Sports
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Jockey Victor Espinoza celebrates as he guides American Pharoah No. 18 after crossing the finish line to win the 141st running of the Kentucky Derby at Churchill Downs on May 2, 2015, in Louisville, Kentucky. Rob Carr/Getty Images
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Victor Espinoza aboard American Pharoah celebrates winning the 141st Kentucky Derby at Churchill Downs. Jamie Rhodes/USA Today Sports
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Jockey Victor Espinoza celebrates as he guides American Pharoah No. 18 after crossing the finish line to win the 141st running of the Kentucky Derby at Churchill Downs on May 2, 2015, in Louisville, Kentucky. Rob Carr/Getty Images