CMA Fest: Keith Urban and Nicole Kidman rock out on the tour bus before stadium concert

Just before he played for tens of thousands of fans at Nissan Stadium on the first night of CMA Music Fest, Keith Urban had a concert for a much smaller audience aboard his tour bus.

As seen on his Instagram stories, the country star warmed up on the banjo just ahead of show time, making up a song on the spot as his wife Nicole Kidman tapped along.

"Backstage at CMA Fest," he sang with a country-blues tone. "On the bus/ feels good, I guess."

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Urban just needed a rhyme there. He soon made it clear that it felt very good to be back at the festival, closing out Thursday night with a celebratory set that included "Days Go By" "Blue Ain't Your Color," "Wild Hearts" and "You'll Think of Me."

Urban told The Tennessean backstage before his performance: "The energy of this crowd is unlike anywhere. It’s such a unique moment. This week in Nashville, period, is unlike any other time in the city. This year especially, [after] having a two-year, pent-up absence. I can already feel it – everybody’s ready to make up for lost time."

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Though she has made cameos at Urban's past Nashville shows (including his New Year's Eve gigs) Kidman didn't pop up on stage at Nissan Stadium. She must have not needed his jacket, as she did when she appeared at his Las Vegas residency last month.

This article originally appeared on Nashville Tennessean: CMA Fest: Watch Keith Urban sing to Nicole Kidman on the tour bus