After months on hiatus, Glee [1] came back with a ton of the original characters reuniting at McKinley High. We've been buzzing about Lea Michele [2] singing Frozen [3]'s "Let It Go" since the season six trailer [4] came out. You can now watch the full version of Michele singing the catchy Disney tune. It feels like a small world when you realize that Idina Menzel sings the song in the movie, and she plays Rachel's mother on Glee. Those pipes run in the family! Watch her nail the song below.