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Keith Urban, Nicole Kidman, SAG Awards 2016, Couples

Kevin Mazur/Getty Images for Turner

Keith Urban is too sweet!

At his concert at Xfinity Center in Mansfield, MA, south of Boston, the 48-year-old country star paid tribute to wife Nicole Kidman and their two daughters, Sunday Rose, 7, and Faith Margaret, 5, Saturday, and even Facetimed with them, as seen in videos posted by fans.

"The show ended and the lights went out and when he came back out for the encore, he was holding his phone out for the crowd to see and the camera was on his phone. Nicole was in the car with the kids!" concertgoer Amanda Walker told E! News exclusively. "The crowd went crazy when they actually realized who he was FaceTiming with."

Urban had spoken to his family while they were in a car.

"I love you baby," he told Kidman. "I'll call you soon."

The show took place on the couple's 10th wedding anniversary. Kidman, 49, is currently in Australia, where both stars grew up, filming season two of the show Top of the Lake. During his concert, Urban said he planned to fly there to see her after the gig.

"We booked the tour at the beginning of the year and June 25th was going to happen in Boston," he said. "And so, I said to Nic, 'I can't work on our anniversary and so maybe we'll play Boston another time.' And she said, 'What about I come up to Boston instead?' I said, 'That's a great plan.'"

"She was scheduled to shoot a film in Australia and it was going to happen last month," he continued. "So everything was winding up, it was looking really good and suddenly they said, 'We're actually gonna shoot the film in June in Australia,' which threw everything out. So after the gig tonight I am flying to Australia to celebrate our anniversary."

Nicole Kidman, Top Of The Lake

GC Images

During his concert, Urban had photos of his family displayed for the audience. Among them was a pic from his and Kidman's first-ever meeting, at the 2005 G'Day L.A.: Australia Week gala. Urban had shared the photo on his Instagram page hours earlier.

He later took to Instagram to thank the fans.

A photo posted by Keith Urban (@keithurban) on

"It was an extra special night because it was our 10 year anniversary and you guys made the sweetest signs down in the front," he wrote. "It was amazing, thank you so much!!!" 

Kidman had told E! News in April, regarding their anniversary, "We actually said we're gonna celebrate all year."

"We just feel incredibly lucky," Urban added.