In the images, which were released this week, the blonde beauty joins fellow models Daria Werbowy, Julia Stegner, Erin Wasson and Sasha Pivovarova in showing off the colourful looks.
Lara, who wears a yellow string bikini as well as a navy number, parades her perfectly toned body, looking gorgeous against the backdrop of St Barts' crystal blue ocean.
Though the 26-year-old looked in her element with the sea and sand, she admitted during the shoot that she didn't go to the beach often as a child.
"My dad's obsessed with Eastern Europe," she explained with a giggle.
But since her childhood, she's made up for the lost time with some special getaways, including a recent one to Mexico with fiancé David.
"We just had such an amazing time," said Lara, a self-proclaimed beachbum. "It was so relaxing and beautiful and gorgeous and we were so in love."
And the pair, who got engaged in January, are still going strong.
They were spotted dining at the Ivy Thursday night and plan to marry later this month at Claridge's in London in front of an A-list crowd of friends and family.