Rosalía ’s ‘Lux’ tour is a work of art. That’s a message the Spanish artist conveys even before she takes the stage – in place of a support act, classical music plays over the PA, while the stage is covered by what looks like the back of a painter’s canvas. It gives the impression that, while the audience waits for the show to begin, a masterpiece is being prepared on the other side. READ MORE:  Rosalía – ‘Lux’ review: an arresting album of astonishing scope and ambition Once things do kick off, it’s hard to argue: Largely dedicated to the songs from Rosalía’s astonishing and artful 2025 album ‘Lux’, which found her singing in 13 languages and mixing cool with classical, tonight’s (May 5) show practically turns The O2 into a museum. When the two sides of the canvas split to show what’s hiding behind, we’re greeted by blocks draped with dust covers. Dancers pull a sheet off one box, lift its lid and dismantle its sides to reveal tonight’s architect in tutu and ballet shoes, poised on a plinth.…