03/02/2015 12:36 pm ET | Updated Mar 02, 2015

Lady Gaga Takes Polar Plunge Into Chicago's Lake Michigan For Charity

Lady Gaga has pulled some pretty crazy stunts over the years, but jumping into Chicago's Lake Michigan in sub-freezing temperatures might be her craziest one yet. Still, it was all for a good cause and she wasn't alone.

On Sunday, the 28-year-old pop star and her fiance Taylor Kinney took the Chicago Polar Plunge and braved Lake Michigan's icy waters to raise money for a local chapter of the the Special Olympics, reports People magazine.

According to the Associated Press, 4,500 people took part in the freezing-cold fundraiser, including actor Vince Vaughn, who jumped in wearing a Chicago Blackhawks jersey and jeans.

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