Similarly, their performance of “Fire” featured even more pyro. They flexed their choreography skills on the “Mic Drop” remix (but didn’t drop their mics at the end.) And they kept moving in the round for “Run,” so that all of the 40,000 people gathered for the first night could see one of them at a time.

It was 21 March and, after a long break, J-Hope, RM, Suga, Jin, Jimin, V and Jungkook had taken to the stage again - silhouettes against an arch of LED screens framing the historic gate to the royal palace in Seoul, as screaming crowds stretched for blocks.

BTS were battered by the elements as they kicked off their marathon world tour in Goyang Stadium, South Korea. The band, and their fans, were drenched by heavy downpours throughout the open-air show.

On Monday, BTS became the first group in history to earn six #1 debuts on the Billboard Hot 100, but some fans fear they've become "westernized."

The return of the world's biggest boy band BTS looks set to be a major money-spinner — we take a deep dive into BTSnomics to find out more.