The Backstreet Boys don't sing.
AJ McLean . He is a member of the vocal group the Backstreet Boys . Backstreet Boys . The group consists of AJ McLean , Howie D. , Nick Carter , Kevin Richardson , and Brian Littrell . They rose to superstardom with their third studio album Millennium ( 1999 ) and its follow-up album , Black & Blue ( 2000 ) .