Let it Go, Let it Grow. The best children's movie of 2013 (Frozen) and the best of 2012 (The Lorax) have very similar lyrics to their anthems. Even the melodies have something similar to them. I don't think plagiarism has anything to do with the similarity, but that both movies are tapping into something very interesting about the zeitgeist.
Helena Iara also uses the same "Let..." construction, and quite often. I notice it, because (informed by Portuguese grammar, which makes more sense to her) she will always say, "Daddy, let I climb on this chair..." or any other number of things she thinks I may or may not allow her to do. This little gramattical error, however, points to the most interesting thing about Let it Go, Let it Grow, which is to say, who is the agent of the action? When one says "Daddy, let me do x," who is the actor and who is acted upon?
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