That’d be “As It Was,” the A-ha-esque ditty from their fellow UK artist Harry Styles, which spent 10 ... of Haircut 100’s set in the Radio 2 Piano Room, backed by the BBC Concert Orchestra.

They describe how they relied on instruments more than programming and worked like a band with Styles to come up ... for sure. Harry was playing chords on a keyboard and singing some melodies ...

and Mayer goes on to make this clear by performing the first verse and chorus of Harry Styles’ As It Was, followed by a cover of a-Ha’s Take On Me, using the same chords each time. And, to make it ...