Rihanna flaunts her new grills in the shape of a gun

 It's the trend sweeping the celebrity the world - with rarely a day going by without one star or another showing off their blinged-up smile.
But Rihanna took her love of grills a step too far on Wednesday as she unveiled her new oral accessory.
The singer posted several shots on her Instagram page showing off the new addition to her grills collection - a gold pair in the shape of guns.Never one to shy away from controversy, Rihanna was seen running her tongue over her teeth in the picture, captioning it: 'Up watching Cocaine Cowboyz #KillinDeseHeauxz #phuckyogrill #ilickthegunwhenimdonecuziknowthatrevengeissweet.'More pictures after the jump