That's an unreleased opening theme that has no name.
the whole glee cast
You can find dalton academy warblers singing fireflies on YouTube but I dont remember it on an episode
This question is incomplete.
They do not sing it, they just perform to it. it is the episode, Season 2 Episode 11 Thriller
The song heard in the Glee Season 3 Promo's and the first song sung in season 3 is called "We got the Beat" originally sung by the Go Go's :)
The Scientist by Coldplay is featured in The Break-Up, the fourth episode of Season Four. It is sung by Blaine, Brittany, Emma, Finn, Kurt, Rachel, Santana, and Will.
A Chorus Line (Musical)
Season 1, the final episode of the season. It was sung by Vocal Adrenaline while Quinn was having her baby.
As of 7/30/2010, the last episode aired was "Journey to Regionals," where New Directions places last in Regionals to Vocal Adrenaline and Aural Intensity, and Quinn has her baby.
They sing "Valerie" twice on Glee.The first time, Valerie by The Zutons (Mark Ronson feat. Amy Winehouse version) is featured, it is in Special Education, the ninth episode of Season Two. It is sung by the New Directions, with Santana singing lead.The second time it is sung, Valerie is featured in 100, the twelfth episode of Season Five. It is sung by Brittany and Santana. They re-did the song previously sung in Special Education, the ninth episode of Season Two, as part of the show's special hundredth episode.
The proper title of the song is "Born This Way", and it is performed by Lady Gaga.
I would like to know also the name of that song. this is the chorus - "All I really need is everything I have, all I wanna be is everything I am, all I wanna see is everything I can".