Foo Fighters' most recent album, 2014's Sonic Highways, saw them record eight songs in eight cities, one of which was Austin, Texas. Apparently, they liked their experience in the Lone Star State's capital so much that they recorded five new songs there on Thursday (Oct. 8).

Performing at Zilker Park as part of the Austin City Limits Festival last night (Oct. 9), Dave Grohl told the audience in the video above, “You know what I did last night? I recorded a f---ing song in your beautiful city of Austin, Texas. And I’m just gonna say it now: We recorded five f---ing new songs in your beautiful city of Austin, Texas. We’re gonna give it to you, but not tonight.”

The crowd, thinking they were going to get a world premiere of a brand-spanking-new Foo Fighters song, audibly groaned after hearing the tease. Instead, Grohl brought out acclaimed Austin-based singer-songwriter Ben Kweller to the stage. Grohl, who hadn't seen Kweller in 16 years, ran into him at the studio, where he promptly recorded a harmony part on one of the new tracks.

Together, they performed a “straight-up, sweet, tug-at-your-heartstrings ballad” version of "Big Me," complete with a lead guitar intro by Kweller. The track ended with Kweller joining Grohl on his throne for the last few notes.

A little while later, Grohl brought out guitar wizard Gary Clark, Jr. to play "What Did I Do? / God as My Witness," the Sonic Highways track on which Clark guested.

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This Day in Rock History: October 10