CHICAGO (WLS) -- Chicago is all lit up on Sunday night, celebrating the 50th birthday of "Good Morning America."

The Willis Tower is among the buildings in GMA colors.

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Buildings across the country are lighting up to say thanks for 50 years.

On Monday morning, starting on Eyewitness News at 4:30 a.m., we will have special coverage, including behind-the-scenes footage and interviews from when ABC7's Terrell Brown visited GMA last week.

The Walt Disney Company is the parent company of this ABC station.

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