Robin Roberts joins the judges panel for this week's competition as couples perform dances inspired by the stars most memorable years. Injuries claim their first victim as Billy Dee Williams is unable to perform and is disqualified.
Julianne Hough returns to the show as a guest judge once again. In a change of pace the entire cast opens the show with a wild group dance. Then the contestants switch partners for the competition based on the home audience's Twitter votes. Scores are combined with last week's for next week's elimination. In a special surprise Derek shows off his first choreographed routine for the Macy's Stars of Dance.
Following a group dance by the entire cast James and Peta reprise last night's freestyle at the request of the Twitter audience. Iggy Azalea, NeNe Leakes, Code Simpson, Ariana Grande and Christina Perry perform. Each couple performs one of their memorable dances leading up to the finalists final competitive dance; the "24 Hours Fusion Challenge."