Rav Spolter, I love your blog and find many posts to be incredibly insightful but you really need to watch the film before commenting on this.
Yes, you got the song right, sort of...
Let It Go is about a young lady who has been told her whole life to hide her true talents, in this case to make things freeze but substitute anything else in a more modern context, because she might not be able to control them. She is basically told to live a life of solitude and rather than celebrate her abilities, keep them secret. She rebels, obviously, and goes to the opposite extreme. Her new clothes are symptomatic of this rebellion.
Sound familiar? The overtones for our modern times and specifically for the debate going on amongst different strands of Orthodoxy today about their approach to women is striking. There is a reason this movie has grossed a billion dollars and it has nothing to do with the Disney publicity machine, or else, like most movies, the film would gradually lose its viewership after the first few weeks. In this case, the word of mouth caused the movie's popularity to keep growing and growing. I just have to listen to the hallways in the high school that I teach to hear how many young ladies are singing its songs. This film really hits a chord with many, especially young girls (from age 4 to teenage-hood).
When Elsa, the protagonist in the movie, "lets it go" she creates her own ice castle, unwittingly freezes her entire country, and almost kills her sister. The rest of the movie focuses on Elsa's trying to come to terms with how she can learn to control what makes her special so she can use her talents to help people rather than hurt others.
If you think that I am reading too much into this animated story, here is the shout-out that the husband/wife team who wrote the song gave to their 2 young daughters watching at home when they won the Oscar, ""Never let fear or shame keep you from celebrating the unique people that you are."
You can read more in my recent blog posting: http://techrav.blogspot.com/2014/03/three-lessons-i-learned-from-oscars.html
Personally, I see the slippery slope. How can we, on the one hand, ask our daughters (and sons) to celebrate who they truly are but, on the other hand, create limits so they don't hurt themselves and others, in our case so that they keep within the boundaries set by Halacha? I don't have an answer to this one but I for one would rather celebrate my children's uniqueness than ask that they become a "Box child" as described in this recent blog post: http://baltimorejewishlife.com/m/news/article.php?SECTION_ID=1&ARTICLE_ID=45131