There was actually two songs titled 'smile' one sung by rachel and finn (Lilly Allen Version) and the other sung by New Directions (Charlie Chaplin Version) they were both sung in the episode "Mattress" Season 1 Episode 12.
The one with the yearbook pictures.. the episode is called Mattress.. the one before Sectionals
It is episode 10 : ballads :)
Episode 4
The Glee Episode In Which Finn Happens To Sing Jesse's Girl To Rachel Is Laryngitis
In the episode named "Britney/Brittany"!
Season 2 episode 1 I think
Hell-o (Season 1, episode 14)
Episode 4
The Glee Episode In Which Finn Happens To Sing Jesse's Girl To Rachel Is Laryngitis
In the episode named "Britney/Brittany"!
Season 2 episode 1 I think
Hell-o (Season 1, episode 14)
Episode 2 - Britney/Brittany
Rachel sings ...Baby One More Time in Glee's Britney Spears tribute episode, Britney/Brittany (Season 2, episode 2).
Born This Way. S2 Ep18.
She sings this song in season 1- episode 13 Hell-O to Jesse when he breaks up with her.
It was featured in Pilot and Hairography, both by Finn and Rachel.
Rachel always has people "raining on her parade" so that is she sings this song.
There are two: season one, episode 13 "Sectionals" Season 3 episode 14 "On My Way"