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.
Casts:
Alfonso Ribeiro, Julianne Hough, Carrie Ann Inaba, Bruno Tonioli, Derek Hough, Koko Iwasaki, Alan Bersten, Jenna Johnson, Britt Stewart, Gleb Savchenko, Emma Slater, Brandon Armstrong, Peta Murgatroyd, Rylee Arnold, Sasha Farber, Artem Chigvintsev, Pasha Pashkov, Daniella Karagach, Val Chmerkovskiy