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But at least one person did get the memo about the hats.

[Photos:  Chelsea Lauren/Shutterstock, Broadimage/Shutterstock, Willy Sanjuan/Invision/AP/Shutterstock]
Tags: Farm Rio, Jacquemus, Rosetta Getty, Veuve Clicquot Classic, Zimmermann, Megan Pormer, Rachel Bilson, Karen Gillan, Mae Whitman, Garcelle Beauvais, Golden Brooks, Jessica Lowndes, Aja Naomi King, Maggie Lawson, Mandy Moore, AnnaLynne McCord, Lake Bell
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