Boy bands are musical groups typically composed of young male singers who perform pop music. They often focus on harmonized vocals and catchy melodies, appealing primarily to a teenage audience. Boy bands usually have a distinct image and style, often characterized by coordinated outfits and choreographed dance routines. These groups gained popularity in the late 20th century, with famous examples including Backstreet Boys, NSYNC, and One Direction. Boy bands often have dedicated fan bases and are known for their energetic performances and emotional ballads. Their influence can be seen in contemporary music, inspiring new generations of artists.