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He says the confession, which he made during an interview on The Late Show with Stephen Colbert, has been following him around ever since.

Some people say it was her mesmerising performance on The Late Show with Stephen Colbert last December.

When Colbert brought the idea about doing the exhibit to his friend Brooks — whom he met at Frieze a couple of years ago — her response was an immediate yes.

"You lay on a bed, you've got an eye mask on... there's some talking," she told Colbert, adding that the effects were instant.

Ardern was quick-witted enough to sparkle on Stephen Colbert and shrewd enough to pass effective climate change legislation and protect a woman’s right to choose.