Back in November, it was let slip that Grimes’ Claire Boucher was headed back into the studio with Jack Antonoff’s Bleachers project for another collaboration. Boucher alerted us to the existence of a new single in a Tumblr post yesterday. And this morning, we finally heard the fruits of those sessions, a track called “Entropy” that’s set to debut on this week’s episode of HBO’s Brooklyn dramedy Girls. “Entropy” inverts the workload of the duo’s 2014 team-up “Take It Away,” using Grimes lilting vocals as the centerpiece of a dreamy ’80s-influenced synth-pop track. It’s a fair bit more saccharine than the other singles that Grimes has shared of late, but it’s a delightfully catchy little ode to one of the laws of nature. Listen below.