Sky-high platform heels and a delicate necklace allowed the Stello by Stephanie Stello dress -- and Underwood's right leg -- to truly shine. Her makeup perfectly complemented the sequin number, with a hint of purple eyeshadow and a natural lip.
Underwood has come a long way since she won season four of American Idol -- but she's not opposed to revisiting her roots. In a September interview with ET, the mom of two revealed her condition for an Idol reunion with the reality-singing competition's three original judges -- Simon Cowell, Paula Abdul and Randy Jackson. Kelly Clarkson recently reunited them on her new daytime talk show.
"An Idol reunion?" Underwood marveled. "I see all of those judges. I've never seen them together since I was on the show but that's pretty incredible."
"[I'd be open to a reunion] long as they don't judge me," she cracked. "I'm down if nobody critiques anything."