Celebrate St. Patrick's Day with SI Swimsuit!

Gigi Hadid :: Ben Watts/SI

Lily Aldridge was photographed by James Macari in the Cook Islands. Swimsuit by MAKENA SURF WEAR.

Hannah Davis was photographed by Ben Watts at the Jersey Shore. Swimsuit by Swimsuit by Elizabeth Southwood for Sauvage Swimwear, Surfboard by Grain Surfboards.

Kate Bock was photographed by Ben Watts in Tennessee.

Emily Ratajkowski was photographed by Yu Tsai in Kauai.

Nina Agdal was photographed by James Macari in the Cook Islands. Swimsuit by Beach Riot.

Valerie van der Graaf was photographed by Raphael Mazzucco in Brazil. Scarf by Afghan Hands.

Jessica Gomes was photographed by Derek Kettela in Madagascar. Swimsuit by Martha Rey for The La Boheme.

Solveig was photographed by Ben Watts in Tennessee.

Chrissy Teigen was photographed by James Macari in the Cook Islands. Swimsuit by Kovey.

Emily DiDonato was photographed by Yu Tsai in Kauai.

Irina Shayk was photographed by Yu Tsai in Kauai.

Ariel Meredith was photographed by Ben Morris on U.S. Route 66.

Nina Agdal was photographed by James Macari in the Cook Islands. Swimsuit by Ola Vida.

Chrissy Teigen was photographed by James Macari in the Cook Islands. Swimsuit by MIKOH.

Emily DiDonato was photographed by Yu Tsai in Kauai.