"So You Think You Can Dance?" to name top 20

(CBS News) After weeks of auditions and two episodes of intensive training with choreographers in Las Vegas, "So You Think You Can Dance?" finds its final 20 dancers tonight.

This means the Fox summer dance competition goes into high gear next week, with choreographed routines for each dancer and a weekly elimination until one contestant emerges as "America's favorite dancer."

Nigel Lythgoe and Mary Murphy have been joined at the judge's table this season by a host of dance professionals including "Rock of Ages" director Adam Shankman, and choreographers Tice D'Orio, Lil C and Sonya Tayeh.

Cat Deeley is host.