Nicole Kidman twins with Keith Urban for surprise support for his 57th birthday

Keith Urban was one of the headliners at the Concert for Carolina Benefit Show on Saturday, October 26, held at Bank of America Stadium in Charlotte, North Carolina.

The fundraising event served to raise money and resources for those affected by Hurricane Heleneand was organized by Eric Church and Luke Combs, also featuring performances from Sheryl Crow, Billy Strings, James Taylor, Parmalee, Scotty McCreery and more.

But the night happened to be extremely special for Keith, who celebrated his 57th birthday on stage that day and had the perfect piece of home to mark his special day with him – his wife Nicole Kidman.

The actress, also 57, is fresh from the publicity rounds for her film Baby girl and the new season of Special Ops: Lionessmade a surprise appearance, even with her husband on stage at one point.

She celebrated Eric for “giving Keith a call” on the show, and took the time to point out that it was indeed her husband’s birthday, telling the audience: “I want to say it’s his birthday tonight and he said, ‘The one thing I can do…’ “

Nicole and Keith looked right the perfect couple in their matching black outfits, with the singer dressed in a simple t-shirt and jeans with a leather jacket, while Nicole wore a denim jacket with a black top and skinny jeans.

© Getty Images

The actress then called Eric on stage, who led the crowd in a rousing rendition of “Happy Birthday” for Keith and stayed on stage for a duet with the Australian-American singer.

Nicole posted a clip of their sweet moment on stage on her Instagram stories and said: “It was such an honor to be able to raise money for Hurricane Helen’s recovery. Love you honey xx.”

LATEST: Keith Urban reacts to fan shock over teenage daughter Sunday Rose’s runway debut

The country singer is coming off the first half of his Las Vegas residency at the Fontainebleau Las Vegas in support of his newly released album Highwrap up a run of dates this month before returning in February.

© Getty Images

He talked along People about the thrill of being a live performer and the excitement (and calorie burn) stage shows bring, saying, “I love the adrenaline of a live show. I love that I get two hours of solid cardio on stage.”

MORE: Keith Urban says daughter Sunday needs to ‘get in the trenches’ in a comment about his future

“I’m not going into a gym to do two hours of cardio. I promise you, as always, but I’m going to make this effortless and end up in really good shape.”

© Getty Images

He added: “I’ve got a 10-pound wooden plank around my neck and I’m singing. I love the physicality of what I’m going to do and how I’m going to do it.”

MORE: Keith Urban reveals NYE ​​plans after heartbreaking year for Nicole Kidman and teenage daughters

Speaking about the nerves leading up to playing some of the songs from his new album for the first time, Keith explained that he was trying to replace “nervous” in his vocabulary with “excited”, following a friend’s advice, saying he was “a little bit excited”.

© Instagram

“It feels better already, and it’s probably more true because I’m really interested in knowing what works and what doesn’t work. I have no idea. I think I might have a really bulletproof set list, but opening night maybe tell me otherwise!”