What causes earworms?

Earworms are catchy tunes or phrases that get stuck in our heads, often triggered by repetition, familiarity, or emotional resonance. They can arise from listening to music frequently, particularly songs with simple melodies or lyrics. Psychological factors, such as mood or stress, can also contribute, as they may make certain songs more memorable. Additionally, the brain's tendency to seek patterns and resolve unfinished thoughts can lead to these persistent musical snippets.