Academy Award winner Gwyneth Paltrow, who will guest star as substitute teacher Holly Holliday, takes the lead on Cee-Lo's "Forget You," and is also heard with Will Schuester (Matthew Morrison), leading the cast on a mash-up of "Singin' in the Rain" and Rihanna's "Umbrella." Paltrow and Rachel Berry (Lea Michele) also duet on Chicago's "Nowadays"/"Hot Honey Rag."
To enjoy the "Glee" tracks, look below: