Lady Gaga, Vince Vaughn, others take icy plunge for a good cause

Lady Gaga and actor Vince Vaughn braved the icy cold waters for a celebrity polar plunge in Chicago.

Vince Vaughn was the first to take a dip into the icy Lake Michigan waters.

But the big surprise was when Lady Gaga showed up with her fiancé, actor Taylor Kinney, to take the plunge, too!

Vaughn and Lady Gaga were among more than 4,000 people who jumped into the icy cold waters to raise over $1,000,000 for the Special Olympics