I am heartbroken. My prayers go out to the Jackson family, and my heart goes out to his children.

Let us remember him for his unparalleled contribution to the world of music, his generosity of spirit in his quest to heal the world, and the joy he brought to his millions of devoted fans throughout the world.

I feel blessed to have performed with him several times and to call him my friend. No artist will ever take his place. His star will shine forever -- Mariah Carey