Shirley Bassey getting into big boots, Andre Previn (or should that be Mr Preview?) watching in horror as Eric Morecambe murders Grieg's Piano Concerto in A Minor, Glenda Jackson being a remarkably convincing Ginger Rogers... We've seen these clips time and again, yet somehow they never cease to raise a smile. Penelope Keith, who took part in Morecambe and Wise's 1976 Christmas special, presents the best of the pair's musical routines from the archives.