I had the wonderful privilege of seeing Idina Menzel perform “Let It Go” live at last year’s D23 Expo before Frozen came out. Should you be jealous? Yes, because she rocked that song like nobody’s business. I’m also thankful I watched her perform it then, long before everyone and their mother put up YouTube covers of the song and played it out… like nobody’s business. Luckily, I can still enjoy the other songs on that fantastic soundtrack.
In this live performance of “Do You Want To Build A Snowman?” (a.k.a. the one the Internet hasn't ruined... yet), Kristen Bell reprises her role as Anna, singing as the character at three different ages. She does an amazing job of not just aging the character, but of also gradually evolving how well she can sing on pitch. It’s hard for a bad singer to sound good live, but it can be a difficult task for great singers to believably sing somewhat off tune and then get right back into the pocket.