Simplify the following text for a Grade 6 native English-speaking person.
Original: Eventually , Brian Littrell , Nick Carter , Kevin Richardson , and Howie Dorough were selected meeting Pearlman 's expectations .
Simplified: The remaining four singers are Nick Carter , Howie Dorough , A. J. McLean , and Brian Littrell . The other singer Kevin Richardson left the group to find other things of interest .