Elvis's original 1969 single was a major hit, reaching #6 on the Billboard Hot 100. Visual Tribute
It is a poignant ballad about a widowed father struggling with grief while his children try to comfort him.
Understanding the duet requires context of the original track: The song was penned by Mac Davis .
Elvis and Lisa Marie singing Don’t Cry Daddy together is ... - Facebook
Lisa Marie reportedly found the recording process deeply intimate and emotional, having to pause at times while listening to her father's voice through headphones.
Producers isolated Elvis’s original 1969 vocal track and added new instrumentation alongside Lisa Marie's recorded harmonies.
A dedicated music video was created to accompany the duet, which became a staple for fans: