Grimes teamed up with Bleachers, Jack Antonoff's solo side project, to release "Entropy," a twinkly track that premiered on last night's episode of Girls.

The pair have worked together before, but it's safe to say that Grimes hasn't released anything nearly this poppy—"Entropy" toes the line between charmingly bouncy and sickly sweet. I can't decide if I like it! What do you think?