Overview: In tonight's show Alan is joined by Tess Daly, Ben Cohen, Abbey Clancy, Sophie Ellis-Bextor and Julien Macdonald from the latest series of Strictly Come Dancing, David Mitchell drops in to discuss his new Channel 4 show Was It Something I Said?, and actor James McAvoy chats about his latest movie, Filth. Plus music from Iggy Azalea, who performs Change Your Life.