Rihanna Sunbathes on Surfboard in Black Thong Bikini

 Splash News

Feeling cheeky!

In Hawaii on Thursday, Rihanna ditched the full-body wetsuit and hit the waves, surfboard in tow, while rocking a slinky black g-string bikini.

But the 23-year-old clearly had no intention of catching some surf and instead, put her assets on full display while lounging on her stomach atop the surfboard, done up in a cherry red lipstick, large gold hoop earrings, layers of matching necklaces and bracelets, and her hair styled in a messy 'do.

The Barbados beauty has been showing some major skin since arriving on the island last Saturday. Case in point: the "We Found Love" singer proudly shared a Twitpic of her working out on an elliptical machine while wearing just a tiny white bikini.

Perhaps the scantily-clad singer is showing off her dangeous curves in hopes that her ex-beau Chris Brown, who she's been seretly seeing, will see them?

In the latest issue of Us Weekly, on stands now, a confidant of Brown's tells Us that the two have been known to "meet up casually," adding, "She comes to see him anytime she's in L.A."

"Rihanna loves to live dangerously, and talking to and hooking up with Chris is all part of that," adds a Rihanna insider.

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