Underwood spoke with ET's Rachel Smith backstage after the show, and reflected on what made her want to try and pull off such a different and exciting sort of number.
"Well, we we have these incredible aerialists and dancers in our show in Vegas, Reflection, and they were so inspiring," Underwood said, referring to her Las Vegas residency show. "I was like, 'I wonder if could do that?' And I have the song 'Ghost Story,' and I felt like, well, if there's a song to try it on, it's this one."
"So I worked with our director and choreographer... and we had a couple sessions, and I was like, 'Hey! I'm not too bad!" she added. "I think it'd be great to learn more and and incorporate stuff, even just for fun."
While Underwood seemed fearless about the performance, her husband, Mike Fisher, admitted to ET that he was a little uneasy about it all.
"I was a little bit nervous," he confessed. "I watched some of the [performance] when she first started to do it, but I mean that was crazy."
The pre-recorded performance was filmed at the Resorts World Theatre, home of Underwood's Las Vegas residency, and played on large screens while the singer herself was at the ceremony in Nashville, Tennessee, with Fisher, who joked to ET that he was his wife's "official purse holder" for the evening.
Underwood, CMT's most decorated artist of all time, sported a purple jumpsuit with a lengthy train as she belted out her latest single. She ended things on a high note, joining her dancers in an aerial performance as she delivered the last lines of her emotional song.
According to Underwood, pulling off aerial stunts requires her to be particularly fit, as does performing her residency show in general.
"I mean, I definitely have to be at the top of my game to be able to just do the show, 'cause it's packed and the songs are really hard," she shared. "But, I mean, that's part of what I do. I just wanna be at my best all the time."
"It feels awesome," Underwood said of the big wins. "It's just a great night all around. I have the most amazing fans in the world and I feel like my fans and Jason's fans just united and just gave us superpowers for the night. It was just such a great night and watching the performances, I feel like everybody just had fun and it was just a fun night to party."