Just an hour ago, Spears tweeted the a photo of herself on Will Schuester's stomping grounds along with this cryptic message: "What's up GLEEKS? Having so much fun on set!! Can't wait for you guys to see the episode!" Take a look at the full image after the jump and see if you can guess what role the artist will be playing on her September 28 stint.
In the second episode of the season (entitled "Britney/Brittany"), creator Ryan Murphy has confirmed that the pop artist will be featured during an anesthesia-induced dream sequence at the office of dentist/Pillsbury stealer John Stamos. So if Britney is in costume in this Twitpic, maybe she and her assistant Brett Miller are playing futuristic dental hygienists who also moonlights as Lenscrafters models? [@britneyspears]