We cant even imagine the amount of stress and pressure that Lea Michele was feeling once she found out she'd be singing the insanely huge hit, 'Let It Go' from 'Frozen' for 'Glee.' Not only is it the most recognizable song from the movie, but it's sung by powerhouse Broadway legend, Idina Menzel. Let's be real -- those are some huge shoes to fill, no matter how great a singer you may be.

So when Lea explained that singing it made her throw up involuntarily, we were probably less shocked than we should've been. Things didn't go down exactly the way we imagined -- it had less to do with nerves and more to do with fake weather props -- but still.

During an interview with Jimmy Kimmel, Lea explained what happened, saying, "I was super nervous. The day didn't start off so well. I was singing, there was 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." Talk about totally mortifying.

Lea then went on to say that the rest of the day kind of made up for the vomiting. She explains that a few of the crew members' kids were on-set and, despite knowing Lea from the time they were born, they thought she was Elsa -- and it totally made her day. She said, "It was awesome. I was like, 'I am God right now! I am a Disney princess god!'"

Check out the clip above to hear Lea tell it!

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