Oprah - reduced to tears... getting a big sendoff ahead of her show's big finale.

FOX News Radio's Jennifer Keiper was there:

Chicago bid farewell to Oprah in style. Her crew threw her a little party they called "Surprise Oprah! A Farewell Spectacular."

Thousands of lucky fans attended the event at Chicago's United Center... including Rashi Spillers:

This excited fan was among the roughly 23,000 people who got into the event at Chicago's United Center:

Tom Hanks was one special guest who got the large crowd going Tuesday night:

(this audio courtesy of HARPO Productions)

Oprah's show has been airing for the past 25 years. She says she'll devote more time to her network, "OWN".