Why do we get 'earworms' from songs

Earworms, scientifically known as Involuntary Musical Imagery (INMI), are highly memorable song fragments that spontaneously repeat in our minds, often triggered by hearing the song or even just thinking about it. These persistent melodies are typically short, simple, and have a fast tempo, often featuring unexpected melodic jumps or unique rhythmic patterns that make them "sticky." Researchers believe this phenomenon is tied to the brain's Default Mode Network, which activates during mind-wandering, and the auditory cortex.