The full cast was there to perform except for Chris Colfer, who tweeted that he had to stay behind in Los Angeles to film scenes with Darren Criss and the Warblers!
They performed the “Regionals Version” of the song, which was just nominated for a Grammy Award in the Best Pop Vocal Performance by a Group category.
Wow I know that felt good for Amber (Mercedes) failing to make it on American Idol and now she's performing for Simon on one of the biggest shows in the world!!!!
Dead at Mercedez getting in Simon's face. Glad they didn't pick her for AI though seeing she's having a much more successful career than any idol winner since Jordin Carrie.
@ her getting in Simon's face like she's saying