See pictures of Olivia Palermo and fiance Johannes Huebl -- who opted to keep their swimsuits on -- sunbathing on a nude beach next to naked beachgoers in St. Barts. Credit: CPE/MRA/RAMEY PHOTO

Act natural? Newly engaged Olivia Palermo and Johannes Huebl had some fun in the sun in St. Barts -- despite being surrounded by naked sunbathers! The spouses-to-be opted to keep their swimsuits on while sunbathing on a nude beach on Wednesday, Jan. 8, but didn't seem bothered by their view.

After a day of relaxation on the beach, Palermo, 27, and Huebl flashed smiles at photographers while packing up their things with nude beachgoers behind them. The NYC socialite and former City star wore a cute floral sundress over her strapless gray bikini, while her German model fiance showed off his chest muscles by going shirtless in white swim trunks by Solid & Striped.

This isn't the couple's first time at a nude beach . . . or in St. Barts. They took the same trip last year in January, and were also spotted suntanning in swimwear next to nudists.

The biggest difference this year? The twosome are now happily engaged. Huebl proposed to the MTV reality star over the holidays and shared the news on Instagram Jan. 1. "Happy New Year to everybody and this is how we celebrate it: OP said Y E S," he wrote. He also posted a video of Palermo showing off her engagement ring.