Ukranian Eurovision Song Contest host Oleksandr Skichko urged competitors to "let it all hang out" during the competition.
But one attendee took his encouragement too far - by jumping on stage wearing little more than an Australian flag and a smile.
The streaker interrupted the mid-show performance by 2016 Eurovision victor Jamala, and managed to flash his backside to the world before a burly security guard wrestled him off stage.
![The flasher interrupted the performance of Ukranian singer Jamala, winner of the 2016 Eurovision competition. Photo / Getty](https://www.nzherald.co.nz/resizer/v2/J6LZQ55ZOTOVMY5AZK5I5GFGN4.jpg?auth=fd8ef0087ea6cdde5022c73bb6be44c09392d93d90935b973145f71f87c978b2&width=16&height=11&quality=70&smart=true)
The invasion was commented on by UK presenter Graham Norton, who apologised for the nudity, before suggesting that viewers get "back to Jamala".