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CHICAGO (AP) - Jimmy Fallon has taken a dip in icy Lake Michigan.

"The Tonight Show" host took the plunge dressed in a suit and tie - then screamed and darted out of the water with a shocked expression on his face.

Fallon was making good on his promise to join Mayor Rahm Emanuel in Chicago's annual Polar Plunge if Emanuel would appear on his show.

The mayor jumped in wearing shorts and a Chicago Public Library T-shirt.

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