The Brady Bunch - The Voice of Christmas
Every television show has a Christmas episode every year. Probably the most favorite of all is an episode of The Brady Bunch called "The Voice of Christmas".
In the episode, Carol loses her voice and can't sing at Church on Christmas morning. Cindy goes with Mike to see Santa Claus and in a moment of selflessness, asks Santa to bring her mommies voice back. It's a perennial favorite and people watch it over and over again every year.
I have uploaded the entire episode here for you to enjoy.