When Dave Grohl sat in with the Zac Brown Band at the 2013 Country Music Awards earlier this month, it wasn't a one-off or a publicity stunt: The Foo Fighters frontman and country-folk outfit are releasing a collaborative EP in December!

The Grohl Sessions Vol. 1 comes out 12/10 on iTunes and includes "Day of the Dead," the song they performed at the CMAs together. Vol. 2 is in the works for 2014 as well as a physical vinyl release of Vol. 1.

Speaking to the AP, Brown revealed this whole thing started when he was waiting in line at John Varvatos' Hollywood store to pick up altered clothing for the Grammys. He and Grohl struck up a conversation and the next thing he knew, his band was jamming with the singer-guitarist-drummer.

"I don't know how I tricked him into working with us, but it's really cool," Brown said. Well, we have a guess: Grohl loves making music with anyone else whose work he digs. Within the last year, Grohl teamed up with hard rockers Ghost B.C. and released his collabo-centric Sound City documentary.

Watch the band's announcement video above.