Justin Bieber has added an eyebrow piercing and diamond grill to his look. The "I Don't Care" singer is flexing for the Gram, posting several shots of his addition, which includes a right eyebrow barbell, on Tuesday. Sharing the one above, Bieber also shows off some diamonds on his bottom teeth. His new mouth accessory comes from The Gold Teeth God, who shared a behind the scenes video of the bling before he gave it to the hitmaker. Showing off two rows of diamonds, the silver base was fitted especially for Bieber's mouth.