NEW YORK — Billie Eilish is levitating. Or so it seems. 

When the pop star first emerges on screen in the mouthful Billie Eilish — Hit Me Hard and Soft: The Tour (Live in 3D), she is suspended above a cube built of LED screens, surrounded by a sold-out crowd of over 23,000 fans in the centre of the UK's largest arena — Manchester's Co-op Live.