Rihanna in Hawaii. Credit: Splash News Online

She's sexy and she knows it!

Rihanna's making the most of her Hawaiian beach getaway this week--and showing off her incredible figure in the process.

The "We Found Love" singer--who donned a strapless, fringed black bikini for a beach trip Friday--opted for a barely-there blue and white printed two-piece by Acacia Swimwear three days later, accessorizing with a cowboy hat and an oversize, cableknit coverup.

Recently, the 24-year-old star opened up to Us Weekly about her secret to staying fit: taking advantage of the great outdoors, and the water in particular.

"I love swimming, [and doing] anything in the ocean," the Barbados-born beauty told Us. "That's very, very good for your body."

Rihanna admitted she also takes a realistic approach to dieting, giving up fatty, sugary foods in favor of lighter fare when she's trying to shed pounds.

"Obviously, you'd like to eat what you want," the singer explained. "But I stick to lots of vegetables and white meats, and I stay away from carbs!"