Live Blog: Chicago takes the Polar Plunge!

Barring a last-minute case of cold feet, “The Tonight Show” host Jimmy Fallon is all set to take an icy swim at North Avenue Beach with Mayor Rahm Emanuel this morning. It’s a brrr-omance spawned by a Sun-Times story that ran when Fallon took over NBC’s late-night talker.

Fallon said in the article that he was “scared of” Emanuel, whom he gave an open invitation to be a “Tonight Show” guest — or host, for that matter.

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