ET caught up with the duo backstage at the Rabobank Arena in Bakersfield, California, earlier this month, during their Soul2Soul World Tour, which continues tonight at the Toyota Center in Houston, Texas. Together they spilled the secrets to a long-lasting marriage.
"For me, it's hearing her sing every night," McGraw, who shares three children -- daughters Audrey, Maggie and Gracie -- with Hill, gushed. "That's the best part about [the tour]. Because she's not out there singing much... To see her up onstage, having a great time and just belting it out? I mean, I always say it: when I'm onstage with her, it's like NASCAR trying to keep up with an Indy car. She's just that good. So, to watch her sing and see what she does is pretty inspiring. My hot wife, man."
Hear more from the superstars in the video below!