At one point during the first UK date of Rosalía's jaw-dropping Lux tour, the Spanish star recalled her childhood ambition of playing a show in London.

"When I was studying music in Barcelona, I always dreamt of singing in one very specific place," she told fans at the O2 Arena, before adding, with perfect comic timing: "And that place is the Royal Albert Hall.

"I would say it constantly to myself," she continued. "The Royal Albert Hall, the Royal Albert Hall, the Royal Albert Hall...

"And I never did it. But now I've sold out the O2 twice. God bless London!"

It was a tiny detail in a massive show. But it drove home the unlikely phenomenon of Rosalía's emergence as a global pop star.