Miranda Lambert appeared in a surprise performance withChris Stapletonat the Academy of Country Music (ACM) Awards.

The ACMs announced the change mere minutes before the show was set to air, viaPeople.

Miranda Lambert will instead take the Bluebird stage with Chris tonight for ‘Maggie’s Song.'"

Miranda Lambert and Chris Stapleton performing together at ACMs

Morgane and Chris have five children together, perCountry Living, and welcomed their fifth baby in May 2019.

Lambert posted a video of herself singing the sweet song, “Maggie’s Song,” with Stapleton.

The singers kept their outfits lowkey, with Stapleton wearing dark colors and Lambert wearing a brown tasseled jacket.

Chris and Morgane Stapleton at previous ACM Awards

The lyrics describe the couple’s life with Maggie, which began when they rescued her from a shelter.

For Chris Stapleton, the song has always been difficult to sing.

“It’s all true stuff,” he said in an interview with theLos Angeles Times.

“There’s no embellishment to it … That one was hard to sing.

I kept crying through a lot of it.”

As it turns out,Miranda Lambertmay have been the perfect stand-in for Morgane.

As such, Lambert used the surprise ACM performance to promote Mutt Nation.

Stapleton also promoted the organization in atweetthat went live soon after the performance.

He wrote, “To support or adopt a shelter pet, visit Miranda Lambert’s foundation MuttNation.com.”