St. Barths tiny Gustaf III Airport is tucked in tight next to St. Jean beachgiving Smalls (and Demarchelier) a tailor-made photo op. Marni check-print dress, $2,160; select Neiman Marcus stores. In this story: hair, Jimmy Paul for Bumble and Bumble; makeup, Christian McCulloch. Produced by Float Shoot, St. Barths. Details, see April\s In This Issue.