Premise: Backstreet Boys . The Backstreet Boys have sold over 130 million records worldwide , making them the best-selling boy band in history , and one of the world 's best-selling music artists . A boy band ( or boyband ) 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 , singing love songs marketed towards young females .
Hypothesis: The Backstreet Boys are a vocal group.
Label: ENTAILMENT