Before the stadiums, there were hundreds of small gigs, borrowed sofas and one stubbornly useful loop pedal. The same method still explains Ed Sheeran: write plainly, play anywhere, and make one voice sound like a roomful.

She won her first album-of-the-year Grammy as a teenager recording in a bedroom. A decade in, Billie Eilish keeps proving that quiet, weird, and honest still outsells the formula.