Menzel gave Michele her personal Ok to cover the Frozen tune for Glee's final season premiere and the actress/singer admits the blessing and her nerves got the better of her when it came to singing it in front of the cameras.
She says, "At first I was sort of worried, because Idina sang it and Demi (Lovato) sang it... so many people have done it. But I got Idina's blessing, which was wonderful. We were sort of tweeting each other, and she knew it was happening.
"I felt a lot of pressure... I was super nervous. The day didn't start off so well. I was singing, there was (fake) snow falling, I looked up, trying to make it magical and beautiful, and ended up choking on the snow and vomiting on the ground. And they have it in slow-mo (slow-motion), on film."