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Glee’s Season 5 Christmas episode is about to get scandalous. The cast is currently filming scenes for December 5’s Season 5, Episode 8: rumored to be titled “Previously Unaired Christmas.” We’ve already seen photos of Rachel (Lea Michele), Santana (Naya Rivera), and Kurt (Chris Colfer) dressed in adorable red and green elf costumes whilst singing “Here Comes Santa Claus.” Now, Chris Colfer has taken to Twitter to tease some “very naughty” new developments for Kurt elsewhere during the…