LONDON (Reuters) – Pop will take the podium when London bids farewell to the Olympics on Sunday, with a closing ceremony starring the Spice Girls, Annie Lennox, One Direction and a peculiarly British sense of humor. Undeterred by criticism that the opening ceremony two weeks ago was too British for the rest of the world to fully comprehend, organizers are looking for local inspiration once again as they attempt to deliver a fitting send-off. …