Rihanna is just one of many celebs who has a tattoo addiction.The "S&M" singer is said to have 15 tattoos,including this one underneath her right collarbone, which reads: "Never a failure,always a lesson." According to her preferred tattoo artist Keith "Bang Bang" McCurdy, RiRi requested this particular tat because in her life, instead of considering things to be mistakes,she considers them to be lessons.
