It was the second episode of the first season. Showmance was the name of the episode.
The Glee Episode In Which Finn Happens To Sing Jesse's Girl To Rachel Is Laryngitis
They sang it on the episode called On My Way
Episode 4
They are doing "Sing" in Season 2 Episode 13-Comeback
Prom queen
Every single episode. That is somewhat of a stupid question. He is in the glee club. He must sing. lolz. :)
The Glee Episode In Which Finn Happens To Sing Jesse's Girl To Rachel Is Laryngitis
They sang it on the episode called On My Way
Episode 4
no
Special Education
Dream On.
like every...
episode 3 "Acafellas"
Season 2 Episode 15: "Sexy"
They are doing "Sing" in Season 2 Episode 13-Comeback
In the power of Madonna episode