Zac Brown Band broke out a new cover during their Saturday night (April 16) set at their 2016 Southern Ground Music & Food Festival. Just before the end of their night-closing show, the band tried out a cover of Nathaniel Rateliff & the Night Sweats' recent single, "S.O.B."

"S.O.B." is raucous and soulful, and the perfect match ZBB's harmonies. The Georgia-based group quickly had their Southern Ground audience singing and clapping along to the hit song that's earned Rateliff & the Night Sweats success on numerous charts, a gold-certified single and their first No. 1 song. Press play on the video above to watch Brown and company's cover (though be forewarned that "S.O.B." stands for exactly what you think it does, so the lyrics are ever-so-slightly NSFW).

During their 23-song set on Saturday night, Zac Brown Band also covered Queen, the Beatles and Avicii, among others; they even brought the Marshall Tucker Band, also on the bill at Southern Ground 2016, out for a joint cover of the latter's "Midnight Promises," which readers can watch below. On Sunday night (April 17), ZBB covered the Charlie Daniels Band, Hank Williams and more.

"Every night on stage, every time we get together, there’s something new going on … It’s such a thrill that you never know what you’re gonna get when you get up there," Zac Brown Band fiddler Jimmy De Martini tells The Boot. "It’s definitely a testament to how well these guys can play; everybody in the band is super pro."

Audiences may not know quite what to expect each night, but they’re in good company.

“I never know what our setlist is until 30 minutes before we go on stage,” ZBB member John Driskell Hopkins tells The Boot. “We roll out there, and there it is."

The 2016 Southern Ground Music & Food Festival, which took place April 16-17 at Charleston, S.C.'s MUSC Health Stadium, also featured the Tedeschi Trucks Band, Hunter Hayes, Kacey Musgraves, Sam Bush, Drake White and the Big Fire and many more. Readers can flip through a photo gallery from the event below.

Watch Zac Brown Band, Marshall Tucker Band Cover "Midnight Promises"

Photos From the 2016 Southern Ground Music & Food Festival

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