This Celebrity is an Angel

An angel who has descended on Earth to save mankind. She is among you yet she shines with a brilliance that people couldn't help but notice. She remains under the wraps honing celebrities and geniuses of the world to do better and be better. To eventually save lives. Yet her own life is the biggest tragedy of all. The cruelest and most unfair life has been rewarded to her to gauge the pureness of heart. Her mission is to save the world and the magnitude of her pain is equal to that of her purpose.
One problem, though, she doesn't know who she is. She is just a human in her eyes.