 During the BBC 's 2002 Children in Need appeal , Woodall and Constantine sang their own version of Madonna 's " Vogue " in front of celebrity backing singers . Children in Need 2004 saw them giving EastEnders characters Little Mo and Mo Harris a makeover à la What Not to Wear . Also in 2005 , Woodall voiced a robot version of herself in the well @-@ known science fiction series Doctor Who , in episode " Bad Wolf " . 
