Lady Gaga – Takes the Polar Plunge in the Lake Michigan in Chicago

It they weren't a cool couple before, they certainly are now.

Lady Gaga and her fiancé Taylor Kinney braved the icy waters of Lake Michigan in Chicago as they took the city's Polar Plunge for charity with a host of other celebrities on Sunday.

With the temperature a frigid 45F and the water a bone numbing 35F, it was no small feat.