Sorry Gleeks. The producer has spoken and the QUEEN Britney Spears will not be making an appearance on her upcoming episode of Glee. The producer Ryan Murphy told E!,
“We’re doing an episode about Britney Spears, but she’s not on the show. It’s not like anything we’ve ever done. There’s a twist on it”.
See I don't usually watch Glee but for her I will :)