The superstar posted a throwback video on Friday of herself and her husband, Mike Fisher, singing Gill's classic "I Still Believe in You" to their son Jake when he was an infant.
Jake, a tiny baby at the time, was crying on the bed. In an effort to soothe him, Fisher leans over him and begins to single Gill's classic. When Jake doesn't calm, Underwood's voice fills the room as the infant looks around.
Underwood will perform "Go Rest High on That Mountain" tonight on CMT GIANTS: Vince Gill, which will air at 9/8 p.m. on the network.
"He's an Okie boy, and I'm from Oklahoma," Underwood said. "I feel like getting to grow up and see him and other artists like him that were from a little bit down the road go on to live the dream that I wanted to someday maybe have was just super inspiring. He's got obviously an incredible voice and just some of the most memorable songs in this era of country music. It's just an honor to get to be here."