2,500 volunteers have posed NAKED in the early morning light on Sydney's Bondi Beach.
It's for an art installation, designed to raise awareness of skin cancer.
Legislation was changed to allow public nudity on the beach for the first time - to allow the project to go ahead.
It's by American Photographer Spencer Tunick, who's calling for Australians to get regular ski checks.
Australia is now the worst country in the world to suffer from skin cancer.
