Swimsuit, $1,995, Burberry Prorsum; stacked rings, $700 to $4,450, gold circle ring, $2,600, De Beers; band ring, Underwood's own.
On nails: OPI Nail Lacquer in Who Needs a Prince.
What she wrote in her high school yearbook: "You were supposed to say what you would be doing in 10 years, and I said, 'I will be rich, famous, and married to a hot guy.' I guess I should have added a few more things."
Secret talent: "I can eat any man under the table."
Top & skirt, prices upon request, Giambattista Valli; ring, from $3,300, Piaget; shoes, $795, Jimmy Choo.
On hair: TRESemmé 24 Hour Body Finishing Spray.
Things she's bad at: "I'm probably not great at talking or understanding emotional things. I'll totally listen. But I won't have a lot of advice to give. I'm bad at calling to check in, the long conversation. But in the ways that really matter, I'm there. I would donate a kidney. The people they hate, I hate."
Top, price upon request, Oscar de la Renta; hair clip, editor's own.
On lips: Maybelline New York Color Whisper by Color Sensational Lipcolour in Pin Up Peach.
Favorite singers: "George Michael. Even as a 3-year-old I could pick his voice out of a million. I liked Queen growing up because [Freddie Mercury] could do things I couldn't do. Aerosmith, same thing. Martina McBride hit a lot of awesome, high, long notes. I'd make myself do them. She taught me how to sing, in a way."
What bums her out: "When people say, 'She's hard to talk to.' This guy I know said, 'You know what I love about you? I can sit next to you and I don't have to talk.' And I'm like, 'Thank you?'"
Dress, $1,795, Michael Kors; chain-link bracelet, $3,850, Pomellato; triple-bangle bracelet, price upon request, Cartier; sunglasses, $21.95, ICU Eyewear.
Up next: Portraying Maria von Trapp in a three-hour live version of The Sound of Music, airing this holiday season on NBC. "People are so crazy auto-tuned, and there's so much on TV that isn't wholesome. This seemed to be the best of all worlds."
Lengths she'll go to for good TV: "We have The Walking Dead nights on the tour bus. At one point in Pittsburgh we didn't get satellite reception, so we asked the driver if he could drive us around for an hour. I'm a fan. I'm just waiting for the offer. I could be a zombie."