ONTD

The country music star took a break from her world tour to shoot her third Allure cover—and talk about how much she trusts her husband. Check out these exclusive photos from the shoot, photographed by Alexi Lubomirski at the historic Overholser Mansion in Oklahoma City.

Underwood is happily married to hockey player Mike Fisher—but isn't afraid of a good anti-love-song. In "Good Girl," a track from her latest album, Blown Away, she sings "But he's really good at lying/ Yeah, he'll leave you in the dust/ 'Cause when he says forever/ Well it don't mean much.... Better listen to me, he's low, low, low." Why does she think women give up power so freely to the men they love? "We want that person to be everything we've always wanted," she replies. "If they're not Prince Charming, we try to make them Prince Charming. But Prince Charming does exist! I found one."

Underwood is aware of the challenges of marriage to a professional athlete. "We've seen a lot of celebrities, professional athletes, not exactly always being on their best behavior away from girlfriends, wives, families," she says. But she's not concerned about Fisher. "People would say, 'Do you ever worry that—you know—he's an athlete, he's young, he's good-looking?' And I've never had to worry about him," she continues, "because I've never trusted anybody so completely. Or I didn't know the true meaning of trust. He just...he just wouldn't do that."

Makeup artist Tyron Machhausen went heavy on the mascara "to show off her beautiful green-hazel eyes." Machhausen lined Underwood's upper lashes with a grayish brown pencil and spread shimmery taupe shadow on her lids. He curled her lashes and swiped volumizing mascara on both the top and bottom. He added peachy pink cream blush to Underwood's cheeks, defined the singer's lips with a pink-y nude pencil, and added clear gloss. "Her lips have a nice pink undertone," he said. Silk dress by Gucci.

Hairstylist Peter Gray (shown here) squirted mousse on Underwood's roots, then used a blow-dryer and a paddle brush to shape her hair. Holding a large-barrel curling iron vertically, he wound her hair into loose ringlets. He ran a wide-tooth comb through the waves, roughed up her hair, misted it with texturizing spray, and added a drop of serum on the ends to make it "lived-in and sexy."

In June, Underwood came out in favor of gay marriage. "As a married person myself, I don't know what it's like to be told I can't marry somebody I love," she told a British newspaper. She elaborates: "I'm in favor of acceptance," she says flatly. "And I am a Christian person, and I do love the Lord, and I feel no matter who you are, what you believe, how you live your life, it's not my place to judge. I don't have that power. I don't want that power. It's my place to love and to show God's love to other people, even if they don't live a life like I live. So that's where I'm coming from."

Underwood takes her career seriously. "My mom had a job, and she also took care of us, and she also took care of Dad—I always saw her pulling triple duty, doing more than I ever felt like she needed to," the singer recalls. "I made a promise to myself that it would be more of a team effort in my family someday. And because of that, I became more independent. But it was tough figuring out what kind of guy would work with what I did."

Underwood is proud to say that "underneath every skirt, every dress, I'm wearing shorts. So that everyone in the world knows, if I ever fell down, nobody would get a peek at anything." And usually the shorts are a different color from her onstage outfits, "so that everyone knows they're not seeing my undergarments." Grinning, she waits a beat. "So sad...."