Zac Brown Band performed a career-spanning sampler pack of hits over the course of their time onstage during New Year's Eve Live: Nashville's Big Bash on Saturday (Dec. 31), but perhaps the biggest moment of their set came when husband-and-wife duo the War and Treaty joined them onstage for a soaring, soulful cover performance of Aerosmith's "Sweet Emotion."

Aerosmith's 1975 rock hit was a perfect fit for the two acts, allowing them to showcase their proclivities for genre-bending and shine a light on their robust vocal chops. In particular, the War and Treaty bandmates Michael and Tanya Trotter delivered hair-raising vocal runs during the performance, underscoring their reputation for sharp vocal work and soulful live delivery.

Meanwhile, ZBB kept the crowd on its feet with hard-charging instrumental work, and together, they led fans in a rousing, hard rock singalong as the song came to a rafter-raising climax.

@zacbrownband “Sweet Emotion” with @The War and Treaty—from #soundcheck to New Years Eve LIVE: #Nashville’s Big Bash 🎉 Now streaming on demand on @Paramount Plus #sweetemotion #aerosmith #thewarandtreaty #cover #zacbrownband ♬ original sound - Zac Brown Band

The War and Treaty have been frequent duet partner choices for country A-Listers in recent months. The rising duo — who are the reigning Americana Honors & Awards Duo/Group of the Year — joined Dierks Bentley at the 2021 ACM Awards for a cover performance of U2's "Pride (In the Name of Love.)"

At the 2022 CMA Awards, they shared the stage with Brothers Osborne with another rock cover: "It's Only Rock 'n' Roll (But I Like It)," which they also recorded for a country tribute album to the Rolling Stones called Stoned Cold Country.

Hosted by Jimmie Allen and Elle King, New Year's Eve Live: Nashville's Big Bash featured performances from Jason Aldean, Luke Bryan, Little Big Town and a slew of other big country names. The show aired on New Year's Eve (Dec. 31) on CBS. It's currently available to stream on Paramount+.

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Country stars flocked to Nashville on Wednesday, Nov. 9 for the 2022 CMA Awards. The artists also brought their best looks to the red carpet. Carrie Underwood brought the drama with a long blue gown, top-nominated Lainey Wilson opted for a velvet version of her classic bell bottoms and hosts Luke Bryan and Peyton Manning looked snazzy in suits. Here are some of best dressed, and biggest stars, that graced the CMA Awards red carpet.

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