The 'Let It Grow' meme originates from the climactic musical number of the 2012 animated film 'The Lorax', based on the classic Dr. Seuss book. While the scene was intended to be a heartwarming environmentalist anthem, the internet transformed it into a vehicle for high-energy shitposting and ironic humor. The meme often focuses on the antagonist Aloysius O'Hare's flamboyant singing or the townspeople's sudden collective enthusiasm. It saw a massive resurgence on platforms like YouTube and TikTok through 'bass-boosted' edits, 'Let it Die' remixes, and various absurd re-dubs. Today, it is used to represent anything that is rapidly expanding, out of control, or surprisingly wholesome.