Lorde's new song with dance duo Disclosure has leaked online after mistakenly being uploaded to Spotify.
A 30-second snippet of the Kiwi singer's collaboration Magnets was included in the six-minute medley of Disclosure's new album Caracal, due out on September 25.
Dance music website YourEDM.com reported someone had captured the medley and reposted it online.
Magnets starts at the two-minute mark:
The song, a shuddering electro jam, includes Lorde singing the lyrics: "Dancing past the point of no return / Let go / We can free ourselves of all we've learned / I love the secret language that we're speaking / Say it to me / Let's embrace the point of no return."
Disclosure have been hyping Magnets, saying Lorde "challenged" the duo to go harder in the studio.
"I'm really excited for her fan base to hear it as well as ours because it's a really big collab, not just like in terms of her singing on a Disclosure tune but the whole thing is a collab, from the drum sounds to the chords.
"It was like someone challenging us, someone saying, 'We can get that extra ten percent.' We totally did. Magnets was a really nicely written song."
The artists have taken to social media to talk about the song.
In an interview with Spin, Disclosure's Howard Lawrence said they preferred to work with accomplished songwriters.
"We're very picky with who we work in the first place, so we only choose people we know have written their own songs and are good at writing," he said.
Aside from Lorde, the brothers' second album Caracal also features collaborations with The Weeknd, Sam Smith and Miguel.