Paws up, Little Monsters! Lady Gaga got a tattoo for you. The 28-year-old pop star, known as Mother Monster to her fans, got a large "Monster Paw" inked on her back Thursday. She Instagrammed some very revealing pictures of tattoo artist Eric Gonzalez hard at work on the design. And while Gaga's new body art is on her back, she inexplicably left her bare butt exposed during the tattooing process. She revealed in a Reddit AMA question and answer session Friday, "My favorite tattoo is the one I got last night in Hamburg."