
The arena -- usually home to the Chicago Bulls and Blackhawks -- is packed to the rafters ... according to our spies.
Oprah's A-list friends -- Tom Cruise, John Travolta, and Madonna -- are all expected to hit the enormous two-part stage ... during a taping that could take up to four hours.
Even Maria Shriver is in Chi-town for the show. Wonder what she has to talk about?











