Milei performed for 8,000 people at Buenos Aires' historic Luna Park, joined by a party lawmaker on drums and his biographer on bass.
With wild hair, a black leather coat, and jumping around, Milei sang "Panic Show" by La Renga before launching his new book.
"I'm the king, I'm the lion ... I eat the elite for breakfast," Milei shouted the lyrics.
The libertarian leader, in office since December, often likens himself to a fierce lion, cutting budgets and breaking political norms. He frequently targets the political elite, or "caste," blaming them for Argentina's economic woes and soaring triple-digit inflation.
After the performance, the event shifted to the launch of his book "Capitalism, Socialism and the Neoclassical Trap". "The cultural battle must be fought in the classroom, in politics and everywhere, you can't stop fighting because otherwise the lefties will beat us," Milei said.
Not exactly the behaviour we have seen, or come to expect, from presidents of countries, is it? One could never call this behaviour dignified. One can but wonder what the general population of Argentina feels about this wild, outrageous, onstage spectacle! Especially the people who are hurting as a result of Milei’s extreme policies. – © Mark Alexander
