Ben Shephard introduces as choreographers Arlene Phillips and Bruno Tonioli go head to head in a bid to create the ultimate singing and dancing group. In this edition the battle of the century commences as they fight it out to pick their groups. In this edition we see the final 16 dancers perform for the very first time, singing and dancing in the hope of impressing the viewers at home and the all important choreographers. Have the dancers got what it takes to make the cut or will they be going home with their dreams in tatters?