NKOTBSB was an American pop supergroup consisting of the members of American boy bands New Kids on the Block and Backstreet Boys. Howie Dorough of the Backstreet Boys came up with the name, which is a combination of established initialisms of each groups' names, NKOTB and BSB. Together they have released one compilation album, the eponymous NKOTBSB (2011) and one single, "Don't Turn Out the Lights". They toured in North America, Europe, Australia, and Asia in 2011 and 2012.

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.