Amy Grant's daughter, Gloria "Millie" Chapman, just made the most wonderful and selfless decision.
At 23-years-old, she decided to donate a kidney to her best friend. Millie and Katherine have been attached at the hip since they were diapers, and they've been through thick and thin together.
Katherine suffers from a degenerative kidney disease. When the time came for her to need a new kidney, Millie didn't hesitate to raise her hand.
"I was proud of her for a lot of things, this is just in a realm all in its own," Grant told Inside Edition.