It seems there is never a dull moment for Rihanna and her closet pal Melissa Forde.

The superstar took part in what appears to be a very sexy and impromptu photoshoot, with the results spread across her best friend's Instagram account for all to see on Wednesday.

In the series of sultry images, the 28-year-old singer looks sensational in a racy, plunging lace-up black swimsuit by Suga Apple Swimwear, her peachy derriere and long, lean legs on show as she poses up a storm.

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A photo posted by @mdollas11 on Jun 1, 2016 at 12:05pm PDT

The barely-there item of swimwear was cut so high on the bottoms it went above and beyond the line of her gently curved hips, revealing a tattoo across her rounded derriere and another on her right upper thigh.

Largely backless, the rather unpractical swimming costume also showed off her ample chest and flat, toned stomach with its plunging, front and lace-up sides, her sideboob also on display.

The tattoo between her breasts was also on show - an inking of the Goddess Isis - covered slightly with an array of dainty gold necklaces and a body chain.

See Rihanna updates as she flaunts her stunning figure and enviably peachy derriere

A photo posted by @mdollas11 on Jun 1, 2016 at 12:16pm PDT

A photo posted by @mdollas11 on Jun 1, 2016 at 12:06pm PDT

A photo posted by @mdollas11 on Jun 1, 2016 at 12:06pm PDT

Rihanna made sure to show off her best side in a couple of the images, flaunting her backside for the camera while stood in a low-key dining room, class of white wine in hand.

Showing off her silky, smooth and incredibly toned skin, she also caught the eye thanks to her naturally beautiful face turned towards the lens, her flawless appearance only added to with the slightest touch of make-up.

The stunning star's raven mane was scraped up into a high top-knot for the photo shoot, which also saw her get into a pool to continue exhibiting her tattoo-covered figure.

A photo posted by @mdollas11 on Jun 1, 2016 at 12:03pm PDT

A photo posted by @mdollas11 on Jun 1, 2016 at 12:15pm PDT

Sticking to a moody theme, Rihanna refused to raise a smile for her time in front of the camera, instead oozing sass and sex appeal while chucking out cursory glares, pouting all the while.

Rihanna's closest pal opted to leave the captions on the images blank, sharing them wordlessly with her own respectably fanbase of 713k followers.

Taking some time out from her busy schedule, Rihanna is set to return to her A world tour in mid-June, when she heads to Europe to continue her dates after wrapping the American leg in May.

Fun in the sun: Rihanna was also recently seen chilling out in a pool while wearing a tiny pink bikini, relaxing on an inflatable swan

Before the fall: She flaunted her stunning figure as she sat astride the large toy bird

Her first stop will be Amsterdam in the Netherlands on June 17, and from there she'll go on to locations including London, Glasgow, Hamburg, Milan and Barcelona.

Meanwhile, the saucy photoshoot snaps came after the B***h Better Have My Money hitmaker was seen playing around with an inflatable swan in a pool before falling off in a hilarious Snapchat video.

The bikini-clad singer, who was being filmed by a pal at the time, went under water when her Gray Malin x Funboy Swan Float flipped.

Snapchatting the moment, the amusedstar stated Wine 1, Rob 0, - a reference to her birth name Robyn Fenty, and the fact that she may have been drinking after plunging into the water.

Over she goes: Snapchatting the moment, the amused star stated Wine 1, Rob 0, Swan - a reference to her birth name Robyn Fenty - and the fact that she may have been drinking