Ob-La-Di, Ob-La-Da, Amygdala

Word as Earworm: “Can a word be an earworm? An earworm is a tune that lodges itself in the brain and will not be moved. Songs like “It’s a Small World” or “Ob-La-Di, Ob-La-Da” can become earworms. In a different class, “Là ci darem la mano,” from Mozart’s “Don Giovanni,” might insinuate itself into every waking moment, although it seems wrong to compare such a lovely aria to an invertebrate.” (New York Times )