They sang it in episode 6 of season 2, "Never Been Kissed," which aired in the US on November 9th.
I think it's the episode called Vitamin D (episode 6) in which mash-ups of two songs are performed by the two teams in Glee club (Girls vs. Boys). The girls performs a mash-up of Halo and Walking on Sunshine.
Season 1 episode 8, Mash-Up
Start Me Up/Livin' on a Prayer by The Rolling Stones/Bon Jovi is a mash-up featured in Never Been Kissed, the sixth episode of Season Two. It is sung by the New Directions Girls. All the girls have solos in the song with the exception of Quinn.The girls sing it as part of the second annual Boys vs. Girls mash-up competition.
That's Mash-up
Rumour Has It/Someone Like You by Adele is a mash-up featured in Mash Off, the sixth episode of Season Three.
I think it's the episode called Vitamin D (episode 6) in which mash-ups of two songs are performed by the two teams in Glee club (Girls vs. Boys). The girls performs a mash-up of Halo and Walking on Sunshine.
Episode 8 - Mash-up
Season 1 episode 8, Mash-Up
Start Me Up/Livin' on a Prayer by The Rolling Stones/Bon Jovi is a mash-up featured in Never Been Kissed, the sixth episode of Season Two. It is sung by the New Directions Girls. All the girls have solos in the song with the exception of Quinn.The girls sing it as part of the second annual Boys vs. Girls mash-up competition.
Mash-Up - Season 1, Episode 8
If you are referring to the episode of Glee that aired on Tuesday, November 15th, 2011, it was called Mash Off.
mash-up
That's Mash-up
The boys perform a Mash-up of "It's My Life" and "Confessions" in the episode titled Vitamin D.
Rumour Has It/Someone Like You by Adele is a mash-up featured in Mash Off, the sixth episode of Season Three.
I believe it's episode 8 - Mash-Up
Mr. Shuester