Nick was challenged by AGT judge Mel B (she also challenged fellow judge Heidi Klum) to take on the infamous Ice Bucket Challenge. Both Nick and Heidi accepted on-air agreeing to not only take on the challenge but to also donate money as well. Nick took his step further agreeing to do it naked. Well, he's a man of his word and below his the proof. Nick in return challenged remaining AGT judges Howard Stern and Howie Mandel, as well as basketball legend Shaquille O'Neal.