Keith Urban was joined by Dan + Shay for a performance of his single "Tonight I Wanna Cry," at Summerfest 2015 in Wisconsin. The duo were serving as Urban's opening act for the June 26 show.

Press play on the video above to see footage of Urban and Dan + Shay rehearsing the song on a tour bus, followed by video of the three country artists singing together during Urban's set.

"We were in the basement of my pal's house on a really gloomy day," Urban recalls of the inspiration for the song, which he co-wrote with Monty Powell. "That was pretty easy to write, unfortunately, because it's where I was at.

"Artistically, it's a bit of a quandry because my want is to always be open, very open, with what I write about and how I feel," he continues. "But I also have a want to protect my privacy as well."

The Aussie is currently climbing the charts with his latest single, "John Cougar, John Deere, John 3:16," from his upcoming new album.

“It connected in the way I hoped it would,” Urban says of the song, which he performed for the first time at the 2015 Country Radio Seminar in February, “so I think that’s probably what had all of us start thinking maybe that’s the first song we should get in the studio and work on.”

Dan + Shay are also climbing up the charts with their latest single, "Nothin' Like You," from their 2014 Where It All Began album.

This isn't Urban's first time collaborating with another artist on "Tonight I Wanna Cry." John Mayer sang the 2005 single with Urban in 2010 for an episode of CMT Crossroads.

Find a complete list of Urban's upcoming shows on his website.

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