A messy bun with long hair, a versatile and effortless hairstyle, is created by loosely gathering hair into a bun at the crown of the head, leaving strands intentionally loose for a casual and undone look. An example of this hairstyle is the iconic messy bun worn by actress Jennifer Aniston in the popular TV show "Friends".
The messy bun is a widely adopted hairstyle due to its ease of creation, adaptability to various face shapes and hair textures, and its ability to elevate both casual and formal attire. Historically, the messy bun emerged as a popular hairstyle in the 1990s, gaining prominence in the early 2000s as a symbol of effortless chic.