Mariah Carey released "All I Want for Christmas Is You" in 1994 to moderate success. Today, the song is a megahit and Christmas playlist staple. What happened? WSJ's John Jurgensen called up the "Queen of Christmas" to find out. This episode was originally published on December 11, 2020.We'll return with something new on January 2. Learn more about your ad choices. Visit megaphone.fm/adchoices