He's one of classical music’s most important composers - and on the eve of his 80th birthday, we got to ask him what he thinks about the state of classical music in 2016.
A Facebook user has turned the John Lewis Christmas advert into an absolute nightmare by replacing the music with Ligeti's 'Atmospheres'.
Look at that state of this:
As you can see, it turns the delightful tale of a lonely man on the moon who receives an unexpected Christmas present into a severely unpleasant 'old man stares creepily from the moon, terrifies young girl' story.
Still, it's better than another 'unexpected' dreary indie song covered by a mimsy teenager.