This is about the Mormon Tabernacle Choir on tour at St. Jude's Hospital in Memphis, Tennessee. A little girl had been admitted to St. Jude's with an aggressive form of brain cancer and was undergoing her first round of chemo treatments, which made it important that she not be in large open crowds. As a result, she couldn't attend the Mormon Choir's Memphis concert the previous evening. Somehow her family sent a request asking that a few of the choir members, maybe, could meet the young girl at a hotel lobby.
Mormon Tabernacle Choir's concert for a girl with cancer - YouTube