The pop-star made her love for Hello Kitty ink-official at the Hello Kitty Convention on October 30, just days before the "kitten’s" 40th birthday. HK Ink (the convention's tattoo parlor) tattooed the harmless face of Hello Kitty on Perry’s right middle finger. This isn’t Perry’s first tattoo, she has some more sweet little characters on her body in addition to “Jesus” written across her wrist. Ex-hubby Russell Brand shares “just go with the flow” written in Sanskrit with Perry, too. Hello Kitty and Katy Perry will be celebrating their birthday’s together for years to come as the singer turned 30 on October 25.