“We Were Us,” Keith Urban‘s duet with Miranda Lambert, is poised to hit No. 1 on the country charts, and the two superstars were thrilled to get to record together.

“[Miranda’s] such an incredible singer and I’ve always thought it’d be cool to do a duet together if the right song ever came along,” says Keith. “When I heard ‘We Were Us,’ it was instant. I had two thoughts. The first, that ‘THIS is the song’ and the second, ‘Man, I hope she says yes!'”

The video for “We Were Us” will debut on Friday at 7:30pm ET on Keith’s Facebook page, which will be followed by a chance to get to chat with him.

Check out the behind-the-scenes look at the making of Keith and Miranda’s soaring duet below.