Lorde's comeback song 'What Was That' is giving us life!

Kiwi alt-pop icon Lorde is back with a brand new single, 'What Was That'.

Officially launching her new era of music, the synth-pop song marks her first major release in almost four years.

"Late 2023. Back in New York. Deep breakup," Lorde wrote on her website to accompany its release. "Stopping birth control. Every meal a battle. Flashbacks and waves. Feeling grief's vortex and letting it take me. Opening my mouth and recording what fell out… The sound of my rebirth."

The accompanying music video was shot on location in New York, including Washington Square Park, where Lorde surprised fans with a pop-up performance.

Thanks to NZ On Air.