SSeymour122113_06-full.jpgSpread Pictures

45-year-old Stephanie Seymour showed off her impressive body over the weekend in St. Barth, and yes, you read that correctly -- she's 45!

Seymour and her family always head to the island for their winter vacation, so if you want to see more of the retired supermodel's smokin' hot figure, she'll be there for a while! Seymour was joined by hubby Peter Brant, their kids and the family's King Charles spaniel.