Rihanna Credit: Facebook

Is Rihanna auditioning for Girls Gone Wild?

The "Where Have You Been" singer, 24, shared a handful of racy pictures from her Hawaiian vacation via Facebook Monday. In one image, the naughty star flings off her white bikini top while standing underneath a waterfall. She does, however, remember to cover her breasts with her right hand.

Other sexy images include the singer playing with the strings of her bikini bottoms on the beach, descending into a shark tank and posing in front of the pool.

In March, the VitaCoco spokeswoman told Us Weekly how she maintains her amazing bikini body. "I don't really have a workout routine. I'm very inconsistent when it comes to actually working out, but I find other things to do that are active, like dancing," she said. "I love swimming -- anything in the ocean. That's very, very good for your body."

The Battleship actress, who occasionally goes hiking or horseback riding in L.A., added that her recent weight loss wasn't intentional. "That was not something I even tried to do," Rihanna told Us. "I never weighed myself, so I don't know how much weight I was to know how much I lost. . . but I dropped two sizes down."

She added: "I'm not excited about how skinny I am, so it wasn't a goal for me or anything."

The singer said she's also "in the early stages" of working on her next album, "but I won't be putting that out anytime soon. I want Talk That Talk to have its full life."