Photos : Rihanna en string sur les plages des îles Hawaï

Rated R: Rihanna showed off her pert derriere in a G-string bikini

Go figure: Rihanna's barely-there bikini left nothing to the imagination

As she lay on her stomach, the 23-year-old's black G-string bikini left very little to the imagination.
The skimpy number showed off her pert derriere as she propped herself up on her elbows while floating along in the ocean.
And even her cover-up had been incredibly revealing.

Surf's up!: Rihanna floated on a surfboard in the ocean while on a Hawaiian holiday

Missed a spot?: Rihanna applies suncream to protect her from the strong rays

Not camera shy: Rihanna points knowingly at the onlooking paparazzi

Making adjustments: Rihanna checked that her skimpy bikini was protecting her modesty

The Umbrella singer was wearing a black net dress which she removed once she had taken her spot on the surfboard.
She prevented her brunette tresses from getting wet by piling them on top of her head.
The star also accessorised with in patterned blue bow amid her curly locks.

Covering up?: The dress Rihanna wore over her bikini was equally revealing

Splashing around: Rihanna took a paddle in the ocean after sunbathing on a surfboard

Beach body: Rihanna has no reason to be shy of her incredible figure

The Barbados born singer has been spending her time off on a Hawaiian holiday.

Taking a break: Rihanna has been enjoying some time off on a Hawaiian holiday

Seductive: Rihanna appeared to be posing as she lounged on the surfboard

Instead of a sunbed: Rihanna did not actually surf, instead choosing to sunbathe on the board

Hanging out: Rihanna is enjoying the holiday with friends

She has been spending time with a couple of close friends on the luxurious getaway.
And she has been modelling an array of tiny swimwear as she enjoys the sunshine.
Yesterday the star posted a photo to Twitter which showed her working out on a cross trainer in a white bikini.

Got it covered: Rihanna made sure she was protected with lots of lotion

Red hot: Rihanna added some scarlet lipstick to her beach look

Team effort: Rihanna and a friend carry the surfboard from the ocean

When one of her many followers asked
her what the secrets to her incredible figure are, Rihanna wrote:
'Angles/Lighting/Photoshop :)'
This
week the singer has also found herself at the centre of rumours she has
been secretly meeting up with ex-boyfriend Chris Brown.
Rihanna is said to have been spending time with Brown, who was convicted of assaulting her back in 2009, over the past year.

Beach babe: Rihanna added lots of accessories to her look, including a bow in her hair and gold jewellery

Need an oar?: Rihanna paddled along on her surfboard while soaking up the sunshine

The big reveal: Rihanna removed her net dress once she was sat on top of her surfboard

A source told Us Weekly: 'She comes to see him anytime she's in L.A.
They can't get enough of each other. I don't see it ending well. Rihanna loves to live dangerously, and talking to and hooking up with Chris is all part of that.'
Rihanna has yet to comment on the reports.

Fun in the sun: Rihanna has definitely been making the most of some rare time off

Helping hand: Rihanna had to use her arm as an oar when her friends were not pushing her along