Including a scene that took a whole week to film, and a celebrity cameo that happened by pure chance.
Including Vicky Beckham exploring the aisles of Tesco and Ant and Dec raiding Woolies.
The Christmas classic, which is almost 40 years old, was written by George Michael in his old bedroom at his parent's house in a "moment of wonder".
The greatest Christmas song of all time is almost 30 years old – but we bet you don’t know who inspired the lyrics.
David played Niles Crane in the original series between 1993 and 2004.
There's way more behind the name than we expected.
We know how Jim Carrey’s character stole Christmas – but did you know the actor underwent torture training to prepare for the role?