Decked out in a retro-futuristic metallic outfit and flanked by two kettle-drummers who looked like extras from The Matrix, the 33-year-old singer delivered a show-stealing, bombastic display that proved exactly why she's one of the hottest stars in country music.
Her amazing stage presence even got some praise from fellow country music queen Miranda Lambert, who gushed about being a fan of the American Idol winner when she came up to accept an award after her stunning performance.
Before the show, Underwood spoke with ET on the red carpet at the MGM Grand Garden Arena in Las Vegas, Nevada, where she looked absolutely amazing in a semi-sheer, golden Davidson Zanine gown.
Underwood opened up about her 13-month on baby, Isaiah, and how he's been adapting to life on the road as she tours.
"He's rolling with it. It's a learning experience for all of us," Underwood shared. "We're making up the rules and figuring things out as we go along, [but] it's good."
However, for the ACMs, Underwood explained that her son stayed at home with his dad, NHL star Mike Fisher, at the family's home in Nashville, Tennessee -- making the event a "girl's night out" for the singer, who revealed that she came to the award show with her mom, her sister and her aunt.
Recently, Underwood and her young baby turned out to show their support for her husband when he was honored by the Nashville Predators for playing 1,000 NHL games during his 16-year career. Check out the video below to see the adorable family moment on the ice.