Glee has had some incredible guest stars, Josh Groban, Kristin Chenoweth and recently Neil Patrick Harris. Now, the Britain's Got Talent runner-up Susan Boyle might guest star in Glee's Christmas episode as......the lunch-lady. Glee co-creator Ryan Murphy says “I think Kurt would just die to give her a Christmas makeover. I don’t even know if she’s interested but it’s been pitched".
In the 20th episode "Theatricality" Lea Michele a.k.a Rachel Berry and Idina Menzel (Shelby, Vocal Adrenaline's coach) sing an acoustic version of Lady Gaga's Poker Face.
After making a Madonna episode and coming soon Lady Gaga episode, it makes sense to make a Britney one. When asked about Britney, Ryan Murphy, creator of Glee, said:
"We love Britney, we're talking to Britney. I think you have to be very careful on the show not to do too many tribute episodes. but she certainly has a huge body of work to pull from and the kids grew up with her so that is a consideration, they love her. "