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New of the pair's collaboration began when audio leaked online of a "bad guy" remix featuring new vocals from the Biebs.
Adding fuel to the fire, the Canadian singer-songwriter shared a mysterious tweet on Twitter with just one word: "Remix."
Billie's brother and go-to producer Finneas retweeted the cryptic post to confirm that a collab was indeed on the way.
Eilish herself also subtly broke the news via her Instagram Story where she put an end to rumours that another new album is on the way following the release of 'When We All Fall Asleep, Where Do We Go?'
The 17-year-old American singer gave her biggest clue when she teased that "something" is coming.
"The new album sh*t is fake. buuuuuuuuuuuuuuuuut i might have something for you" she penned.
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