Watch Nicole Kidman and Keith Urban Sing 'Amazing Grace' to Help Sick Children (VIDEO)

(Screenshot: monashhealth/YouTube)

Celebrity couple Nicole Kidman and Keith Urban were visiting the Melbourne Children's Hospital in Australia on Friday when Urban began an impromptu performance of "Amazing Grace" with his guitar. Hospital staff gathered round to sing along, at least until the lesser-known second verse. No problem: Kidman, a Roman Catholic, led it word-for-word.

The couple was there as part of their campaign to support the Celebrate Life Foundation, an organization that helps charities that promote health and wellness.

H/T: Huffington Post