Decked out in designer couture, Australian TV stars Jason Dundas and Kristian Schmid, model Jamie Wright and Biggest Loser trainer Shannan Ponton took the plunge, as an audience of fashion industry hotshots at Sydney's Circular Quay tried not to laugh.
Cosmopolitan magazine and Neutrogena skincare company sponsored the show. Why? "For fun," an organizer said.
As for the models, they tried to prove that you can hold your breath underwater and still look glamorous.