If Olivia Dean is the girl next door, Rosalia is the girl next planet. Their shows in successive weeks at the O2 – Dean had six nights, Rosalia two – were object lessons in presentation. Dean’s gig looked like some high-end light entertainment from the 1970s, Rosalia’s like something the National Theatre might dream up for a new revival of Murder in the Cathedral.

Rosalia emerged in 2017 as the apparent saviour of flamenco – though flamenco traditionalists disagreed: she was Catalan, not Andalusian, and she wasn’t even a gypsy. Then across four albums, she travelled so far that it’s hard to categorise her extraordinary latest one, Lux: a heavily orchestrated, intensely dramatic reverie about the lives of assorted recondite saints. It is not the material from which arena pop stars are conventionally forged.

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