Everyone is abuzz counting down the hours until Oprah Winfrey sits down for her last live taping of 'The Oprah Show' after 25 triumphant years on the air. The taping will take place tonight at the United Center in Chicago, just steps from her usual stage at Harpo Studios.

The venue, which serves as home to the Chicago Bulls and the Chicago Blackhawks, has a capacity of over 20,000. But its capacity still comes nowhere close to accommodating the over 154,000 ticket requests sent to Harpo Productions for the event. Those lucky enough to score one of the coveted free tickets were determined by a random lottery.

Just hours before fans pack the arena, details about what to expect are still closely under wraps.