No. They do some, but a lot of it is just randoms. The actors who play the Warblers also do a lot of backup vocals.
No, they do not sing this number.
laryngitis
The Glee Episode In Which Finn Happens To Sing Jesse's Girl To Rachel Is Laryngitis
Yes they do. I'm not a fan of the actual show, but I've heard a lot of their covers (I'm a fan of many of the originals), and you can hear, frequently, parts where the vocals sound almost too perfect to have been done naturally.
They sang "Gangnam Style" in the episode "Thanksgiving", Episode 8 of Season 4.
No, they do not sing this number.
laryngitis
Yes she is sing background vocals for that song.
No, Kenny Loggins sings "this is it" with McDonald singing background vocals
Shout It Out Loud and Beth
All three Jonas Brothers sing vocals-Nick and Joe share lead vocals, and Kevin does background vocals. (If you want my opinion, I think Kevin should have a solo or two.)
Yes, Jerrod Niemann sings all the background vocals on his song "Lover, Lover." He is known for his distinct vocal style, and in this track, he layers his voice to create the background harmonies that complement the lead vocals. This showcases his versatility as both a singer and a producer.
You can't touch this by MC Hammer
the beelzebubs are a great a capella group and tufts university. I met and got to sing with them recently and it was a lot of fun. they are all very talented singers who also go second place on the sing off and are the vocals of the warblurs on glee
He only do backing vocals, Axl Rose sing lead vocals.
Because rihanna sings her own background vocals, she needs someone else to sing for her in concert while she sings the main track. Usually they hire singers with the same ranges who they audition to sing well with rihanna.
There has been reports that Glee will sing a song from The Wanted in the near future.