The 'We Found Love' singer first posted a picture with Machete actor Danny Trejo.
"Look who's in the #TATTOOparlor...Danny Trejo #G4L p.s. Look up his story!," Rihanna said.
She followed it with a snap of her together with tattoo artist-to-the-stars Mark Mahoney.
The next image shows Rihanna holding a bottle of beer while seemingly being tattooed on her back. The popstar said: "Tat my f**kin name on u girl so I know its real!!! #MINE"
She then posted a photo of her hands with a Tupac-inspired fake tattoo on her knuckles.