As for Nick and Tiela they were happily married a year later. They had twins a few months later named Heather and Jake.
AJ and Emily got married four years later and had two girls and a boy, named Felicia, Danica, and Brad.
Trisha and Howie still haven’t gotten married but they are engaged. They are waiting until Trisha is done with her world tour.
Lastly, Ashley and Kevin. They got married a year later only to get divorced the next year. Nobody really keeps in touch with Ashley anymore because she cheated on Kevin.
As for the Backstreet Boys, they released two more albums and decided to call it quits after Kevin turned 33. The guys still remained the best of friends though.