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Ronda Rousey was photographed by Walter Iooss Jr. in Captiva, Florida.

Caroline Wozniacki was photographed by Walter Iooss Jr. in Captiva, Florida.

Chrissy Teigen was photographed by Yu Tsai in California.

Anastasia Ashley was photographed by Adam Franzino in Guana Island. Swimsuit by Indah.

Kate Upton was photographed by James Macari in the Cook Islands. Swimsuit by Peixoto Swim.

Alex Morgan was photographed by Adam Franzino in Guana Island. Swimsuit by Ola Vida.

Ronda Rousey was photographed by Walter Iooss Jr. in Captiva, Florida.

Caroline Wozniacki was photographed by Walter Iooss Jr. in Captiva, Florida.

Chrissy Teigen was photographed by Yu Tsai in California.

Anastasia Ashley was photographed by Adam Franzino in Guana Island. Swimsuit by Anna Kosturova.

Kate Upton was photographed by James Macari in the Cook Islands. Swimsuit by Pitusa.

Alex Morgan was photographed by Adam Franzino in Guana Island. Swimsuit by San Lorenzo