♪ skinny so skinny. leading us off, a beloved song by so many. but how could it have made the star of "glee" sick. >> a lot of people are saying it made them sick by this point. we're talking about "let it go." you may have heard of it. jimmy kimmel with lea michele who sang the song on "glee" said she had a rough time with the song onset. >> she looked in to the falling snow and got some stuck in her throat and had to throw up. she admitted the day didn't start off well for her and she wasn't feeling her best but she recovered and got a good take in not before the crew captured her nauseous moment and slo-moed it for her. >> we don't have that video.