The UN head was in Vienna, Austria for the opening of a major conference on landlocked developing countries, and was expressing his gratitude to the host country - but accidentally thanked Australia instead during a sidelines news conference.
After being tipped off by aides, Ban apologized, noting he knows full well that there are "no kangaroos in Austria".
In addition to attending the conference, Ban actively promoted human rights in cooperation with the Austrian winner of the Eurovision Song Contest, the cross-dressing drag performer 25-year-old Conchita Wurst - played by Austrian Tom Neuwirth.
"I dream of a future in which we do not have to talk about sexual orientation, skin colour or religious beliefs," Wurst said on Monday during an appearance at the UN building in Vienna.
Among those present was Robert Mugabe, the 90-year-old president of Zimbabwe, and Bolivian President Evo Morales. Neither attended Wurst's performance.
"The inspired, logical choice for my replacement was Graham," Wogan says.
"Norton says my only advice to him was not to start drinking before song seven."
"He made it his own from year one – although I’m bound to say that the Bearded Lady who won this year, reducing Graham to tears, might have had a slightly different effect on me."
"I’ve always seen the Eurovision as a sometimes foolish farce, but not as a freak show."
One Russian lawmaker described Wurst's win as "signifying the end of Europe". Some church leaders blamed Wurst for flooding in the Balkan region.
However Austrian President Heinz Fischer said it was "not just a victory for Austria, but above all for diversity and tolerance in Europe".