The upcoming third episode of Foo Fighters' HBO series, 'Sonic Highways,' follows the band to Nashville -- and the song they recorded there is now streaming online.

The rowdy 'Congregation' (above) was laid down at country artist Zac Brown's Southern Ground Studios and features the lyric, "And they're singing like a bluebird in the round," which would seem to be a nod to Nashville's legendary Bluebird Cafe, where frontman Dave Grohl made an acoustic appearance in May. Footage from that show is in the trailer for the next episode of 'Sonic Highways' (below), set to premiere tonight (Oct. 31).

Grohl told Rolling Stone, "In Nashville it seems like there are these rites of passage that you have to go through to become a star, whether you're a singer or a songwriter, and the Bluebird is really one of those. If you can get down at the Bluebird, you've got a gig."

This is just the latest development in Grohl's increasing involvement with Nashville and country music. Last November, he drummed with Brown during the singer's performance at the CMA Awards and earlier this month, Brown performed with Foo Fighters during their residency on the 'Late Show With David Letterman.' Grohl also produced Brown's EP, 'The Grohl Sessions, Vol. 1,' which dropped last year.

'Congregation' will appear on Foo Fighters' upcoming eighth album, 'Sonic Highways,' which was recorded at eight different studios in eight different iconic music towns. The album hits store shelves on Nov. 10.

'Sonic Highways' Nashville Episode Trailer

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