DONNA SUMMER, SINGER "I've known Michael for many years and we've done many different things together over the years. "I know his family and it's just a total shock. I don't even have words to say. I mean I'll miss Michael, the world will miss Michael and I'm sure the world is in a state of grief right now. "I will personally miss him, I will miss his light, I will miss his star, I will miss who he has caused other people to become because of his greatness. He upped the standard."