Lady Gaga and Vince Vaughn made plunges into the icy waters of Chicago's Lake Michigan at a fundraiser for Special Olympics.
Polar Plunge spokeswoman Maura Bruton confirmed Sunday that Gaga did the plunge along with more than 4,500 other participants.
Gaga recently announced her engagement to "Chicago Fire" actor Taylor Kinney. Photos from the Polar Plunge show her and a bare-chested Kinney going into the water for the 15th annual event.
PHOTOS: Lady Gaga & Taylor Kinney
Vaughn also made the plunge. The Lake Forest native was dressed in his Chicago Blackhawks jersey and jeans. He went in up to his knees, then eased himself down backward in the water.
Last year, comedian Jimmy Fallon helped raise more than $1 million at the event. Fallon jumped into Lake Michigan wearing a suit and tie.
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