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  • Rihanna shows off a mean-looking gun grill
  • Kneeling down, Rihanna flaunts her bikini body
  • Rihanna chooses a feminine swimsuit to go with her tooth jewellery

Rihanna has shown off a gun-shaped tooth grill in a series of saucy pictures on Instagram.

In the snaps, the Bayan singer flashes her killer curves in sexy swimwear and opens her mouth to reveal her golden smile.

'Up watching Cocaine Cowboyz #KillinDeseHeauxz #phuckyogrill,' she posts.

'#ilickthegunwhenimdonecuziknowthatrevengeissweet.'

In one picture Rihanna's kneeling on a sunbed wearing a floral one-piece and in another she teams a barely-there bikini with lashings of accessories.

'she. + Rodarte,' she writes.

The most shocking photo is a close up of Ri-Ri's gnashers.

It shows her licking the tiny weapon that's resting on her pearly whites.

The 25-year-old's following in the footsteps of Harry Styles who was snapped wearing ornate tooth jewellery earlier this week.

The One Direction star, 19, posed for a funny Instagram shot taken by photographer and pal Cal Aurand yesterday.

'Didn't get to BBQ tonight but were still grilling,' joked Cal next to the picture.

Others who've tried the bling include Miley Cyrus, Beyonce Knowles, Kanye West and Justin Bieber.

SEE PICTURES Top 10 hot Rihanna Instagram pictures

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SEE PICTURES Celebrity hair: Rihanna

Kate Lloyd