olivia newton-john

She had the entire audience singing along.

"You are my lighthouse mama," Lattanzi writes.

Urban and his wife, Nicole Kidman, offered a touching memorial statement for Newton-John in the wake of her death.

It's one of her most enduring songs.

She was one of the biggest multi-genre stars of her generation.

She's not interested in the statistics.

There are many -- too many -- country stars who have had cancer or have been personally affected by it in some way.