The best is Bad Romance, telephone and Born This WAy, EPIC!

Applause was shit.

Are you seriously fucking asking that ON A FANSITE FOR GAGA? Could you get any more stupid?

Well, comparing vocal work and just how it sounds, Katy's were better. It's just that anybody can make Katy music sound good. In contrast, for Gaga, it depends. You need a specific kind of sound to pull off a Gaga song.

Duhhh Gaga!

I liked the other covers, and I love glee but the Applause vocals were a bit weak, it was not my favorite.

What a question!

you got also forgot americano

you guys forgot You and I

Adam Lambert! He did an awesome job singing Marry The Night. :D <3

GAGAGAGAGAGA

I loved their ROAR cover! It was amzing

i love both, all the covers

hello ???? Lady Gaga

the one who sing telephone is now a lesbian, lesbian like Ellen

OMG I REMEMBER WHEN THEY DID TELEPHONE SO FUNNY OMG AHAH

Btw and marry the night!

The good thing is Adam Lambert covered Marry The Night on his own and did amazing :) otherwise I don't care for Glee but I did however like the way they performed Bad Romance.

Gaga !!! :)

i'm sorry but Applause was bad, the bests are You and I and Marry The Night