Singer Justin Bieber revealed that he has been diagnosed with a rare disorder that paralyzed half of his face. The Grammy winner shared a video on Instagram in which he talked about his condition. Ramsay Hunt syndrome causes facial paralysis & affects nerves in the face through a shingles outbreak. He showed how one of his eyes wasn't blinking and said, "I can't smile on this side of my face. This nostril will not move. So there's full paralysis on this side of my face." Watch the full video for more.