Country music star Keith Urban and his wife, actress Nicole Kidman, broke out into a song when they visited the Monash Children’s Hospital in Clayton, Australia on June 13.

According to Taste of Country, the couple spent time with patients and took photos with fans during their visit to the hospital over the weekend, which coincided with their trip to Melbourne for the Swisse Celebrate Life Ball, hosted by the Celebrate Life Foundation.

Urban decided to perform an acoustic rendition of “Amazing Grace” while visiting the hospital and was joined by Kidman, as well as the surrounding crowd.

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“It’s one of the most important things I do,” Nicole said in an inteview with the Melbourne-based newspaper the Herald Sun via Hello!. “I have been doing it since I became well known in the movie industry.”

You can check out a video of the performance embedded above.