The narrator announces "this northern Kentucky family...", so with this information, Springfield is generally thought to be in Kentucky. However, the narrator was indicating that the family originally came from Kentucky, but that is not where they live currently. Furthermore, the DVD subtitles say "southern Missouri" instead of "northern Kentucky", emphasizing the gag that the location of Springfield is unknown.
A scene depicted Homer and the cast looking at an episode they just completed in which the family talk about visiting Delaware. Homer mutters to the director, "This'll be the last season." A few episodes later, Simpsons Tall Tales (2001) the conversation about Delaware was actually worked into the show.
"Simpsons Christmas Boogie" winning the Grammy for Best Hard Rock/Metal Recording is a parody of the infamous incident at The 31st Annual Grammy Awards (1989) where Jethro Tull won the award despite not being a Hard Rock/Metal Band.
The episode won an Emmy Award for Outstanding Animated Program..
Ozzy Osbourne is shown biting off the top of an award like he famously bit off a dove and bat's head.