This is one of my favorite too! My voice would never reach that high :C
I'm sorry I'm a get a lot of hate for this, but I hate "let it go". That is spammed way to much for me to like it.
Also...the one in the Disney movie sounds different than the lady who sings it. Just saying...
I don't hate the song "Let It Go", but I do agree it was overplayed to the point where it became annoying. I had already heard the song a bunch of times before I even watched the movie...