It's been a while since we've heard from Lorde. Now, a new song the singer co-wrote with her fellow New Zealanders in Broods, has just come out. "Heartlines" is a bubbly, revelatory dance track with references to "jumping state lines" and midnight car rides. The artists not only share a country, but also a producer, Joel Little, who helps shape the sound of both Lorde and Broods.

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