Friday the 13th of June turned out to be pretty lucky for Monash Children's Hospital in Melbourne, Australia when visiting celebrity Keith Urban treated patients and staff to an impromptu rendition of the hymn Amazing Grace.
Country star Keith perched on a desk outside the Neonatal Intensive Care unit and strummed his guitar as the small crowd around him, many taking pictures on their phones, sang along. (Also read: Love is the 'be-all and end-all': Nicole Kideman)
One particularly tuneful voice stood out among the others and, as the camera pans, is revealed to belong to Keith's movie star wife Nicole Kidman. She knew all the words, even if nobody else among the clearly thrilled and somewhat star-struck choir did.
Nicole's singing has been applauded in Baz Luhrmann's 2001 musical Moulin Rouge. She has also dueted with popstar Robbie Williams on his cover of the Frank Sinatra classic Something Stupid.
Keith and Nicole, who live in Nashville, Tennessee, usually spend some part of their time in their native Australia.
(Also read: Nicole Kidman says Keith Urban "opened up" her sexuality)
Watch Nicole and Keith sing Amazing Grace: