And we're not alone in thinking it wasn't the show's best. As the episode aired, fans took to Twitter to show their dissatisfaction.
"Just heard Glee's cover of Gangnam Style and now I believe in hell," one wrote -- as another wrote "Wow, Gangnam Style on Glee was such an uninspired fail. Even if a certain song is a monster hit, if it feels forced, it will look forced"
Plus, The Warblers performed One Direction's "Live While You're Young" and totally slayed it. Sorry, but this number was clearly the winner:
"Glee" already jumped the shark a while back, but was PSY's "Gangnam Style" one of the worst covers they've done on the show ... or did you actually like it? Sound off below!