This audio is widely shared online as a generic horror sound effect rather than a quote tied to one famous movie or character. Uploads usually label it as a creepy little girl singing “la la la,” and creators use it across short-form videos, meme edits and low-budget horror skits. Its popularity comes from the contrast between a simple nursery-style melody and an eerie vocal tone. It often appears alongside dark filters, slow camera pushes, fake paranormal clips, or a sudden scream meme for the payoff.