Oprah Whips Out Giant Stage for Final Shows

Over 20,000 fans Oprah get their first glimpse of the massive stage O pimped they produce in the Chicago United Center tonight for the registration of some of his last few years shows.

The arena - usually home to the Chicago Bulls and Blackhawks - is packed ... according to our spies.

Friends A list of Oprah - Tom Cruise, John Travolta and Madonna - are all expected to reach the huge stage in two parts ... in a recording which could take up to four hours.

Even Maria Shriver is in Chi-town for the show. I wonder what she was talking about?