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Gleeks! These Three Songs From Glee's 100th Episode Are Undeniably Incredible! (You're Going To LOVE The New Britney Spears Cover The Best!)
And if this photo has anything to do with their performance, U won't be disappointed!
Along with many of our favorite classic Glee songs, there are new ones mixed into the big milestone episode too!
Ch-ch-check out some of the other songs that are being performed on Glee's 100th (below)!