Julianne Hough returns to the show as a forth judge and four new pros join the cast. But the new quirky stars steal the show.

Smokey Robinson performs; a couple is eliminated.

The couples perform a variety of dances, including the cha cha, the rumba, and the foxtrot, for the judges.

A couple is eliminated; Sia performs as Maddie Ziegler and Allison Holker dance; Nico & Vinz performs.

It was all glitz and glamour in the ballroom as the remaining couples danced to songs from their favorite movies.