Season 4: Episode 13

Brittany (Heather Morris) was supposed to sing Robyn's "Dancing On My Own" during Glee Season 4, Episode 13: “Diva,” but the song was ultimately cut form the episode. Now, in honor of Glee's 500th musical number, the show is releasing this never-before-heard song as a special bonus to fans! We love the track, but we can't help but think about what it's context...

Original airdate: Thursday, February 14, 2013 at 9pm on FOX

Darren Criss (Blaine) couldn't have been more excited when he found out he was singing "Don't Stop Me Now" in Glee Season 4, Episode 13: “Diva” — and he also couldn't have been more nervous! Take a look as the cast takes you behind the scenes of this diva-filled episode.