On Sunday, the two artistes took to their respective Instagram accounts to share a post of an unreleased demo, where Jennie can be heard singing a sweet love song while Champion lending his vocals.
The clips went viral and started doing the rounds on social media, with fans reacting to the unexpected collaboration, reports allkpop.com.
A comment read: "Never in my life did I think I would get Jennie × BROCKHAMPTON crumbs..."
"I'm so excited for her and this collab," said another. A user wrote: "And when the official release drops, I won't shut up about it!"
