Photo: George Burns/Harpo Studios

Diana's done it all. She's had hit movies and chart-topping songs, including Grammy®-nominated "Ain't No Mountain High Enough," the song that gave Diana her first solo number-one single.

With such an amazing career, it's hard to imagine a day when Diana will stop singing, but she says that there's one situation that could get her to stop. "I think that if my voice for some reason changes—because your voice does change—then it's time for me not to sing," she says.

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