Talented dancers who spark the judges' interest during auditions are invited to call-backs in Las Vegas, where they work with top choreographers. During the call-back week, the judges choose the Top 20 dancers who will continue in the competition. Th... (more)e Las Vegas Round will air Wednesday, June 6 (9:00-10:00 PM ET/PT) and Thursday, June 7 (9:00-10:00 PM ET/PT), when the top 20 finalists 10 males and 10 females will be announced.