Listen: Grimes and Bleachers Share New 'Girls' Song 'Entropy'

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Grimes performs on Day 2 of the Budweiser Made in America Music Festival on August 31, 2014 in Philadelphia, PA.  

Grimes and Bleachers have shared a new song that will appear in season four of HBO's Girls.

Exclusive: 'Girls' to Premiere New Tracks by St. Vincent, Grimes and Family of the Year

The new track "Entropy" was written by Canadian artist Grimes and Jack Antonoff (the boyfriend of Girls star Lena Dunham), of Fun. and Bleachers fame. Listen below.

"Jack is our secret weapon on the show," Girls music supervisor Manish Raval recently told Billboard. "With him, we have access to so much: he's an amazing songwriter and producer, he has relationships... A lot of times, we'll just ask, 'What are you working on now? Taylor Swift?' I have no problem tapping into that connection."

Encouraged by Raval and others to collaborate, Antonoff and Grimes came up with "Entropy," a rough mix of which Dunham played for Raval from her phone.

"We instantly said, 'That's ours, don't give it to anyone,'" Raval recalls. "It ends one of my favorite episodes ever -- a big party event leads us on a very melancholy note but there's something so awesomely fun and energetic about this track that really plays against the moment."


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