Four is the fourth studio album by English-Irish boy band One Direction, released on 17 November 2014 by Columbia Records and Syco Music. The album was preceded by two singles, "Steal My Girl" and "Night Changes", both achieving platinum status in the US, and scoring the band their tenth and eleventh UK top-ten hits. The album was also One Direction's last with member Zayn Malik, who announced he was leaving the band on 25 March 2015.

A boy band is loosely defined as a vocal group consisting of young male singers, usually in their teenage years or in their twenties at the time of formation. Generally, boy bands perform love songs marketed towards girls and young women. Many boy bands dance as well as sing, usually giving highly choreographed performances. South Korean boy bands usually also have designated rappers.