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"I've known Michael for many years and we've done many different things together over the years,” disco star Donna Summer said in a statement. "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."

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