I really like this song & this animation. If you havent watch the movie, do try to catch it! It's very different from the others. Dubzz, I mean of coz all animations are different, but this is more on sisterly love rather than romance? A story with a good balance of humor, adventures, magical (how can we miss this part in a Disney movie) and love. Enuff spoiler! I just wanna share this song! 

There are other beautiful songs as well, but I find "Let It Go" very inspiring & powerful and therefore my favorite piece!