Synopsis

Julianne Hough reprises her role as guest judge. This week, the entire cast kicks off the show with an energetic group dance number. Following that, contestants will be paired in a competition determined by Twitter votes from the home audience. Scores from this week will be combined with last week's to determine which dancers face elimination. In a special treat, Derek Hough will debut his first choreographed routine for *Macy's Stars of Dance*.