Miranda LambertMiranda Lambert's third album, 'Revolution,' hits stores this week, showing her fans a softer, more vulnerable side. The feisty Texan wrote or co-wrote 11 of the 15 songs on the CD, inspired by one of her musical heroes to step outside her comfort zone.

"I feel like I was getting dangerously close to being shoved in that box of 'She's that crazy girl who kills people in her songs,' " Miranda explains to the LA Times. "That's fine, but there's so much more to me than that; there's so much more to the great music that I love than one song. You listen to Merle Haggard, and there's everything from gospel to songs about his mama and songs about being in prison. Nobody says he only sings about prison, or he only sings about cheating. On this record, it's the first time I really have a lot about every aspect of life, not just the get-even part of me."

In spite of her many accolades -- including the ACM Album of the Year for her last project and a CMA Female Vocalist nod this year, Miranda says she still questions her vocal abilities. Thankfully, she has a constant supporter in her boyfriend, singer Blake Shelton.

Blake Shelton, Miranda Lambert "She's never had that much confidence in her singing, which is odd to me, because she's one of the standouts," Blake gushes of his girlfriend of more than three years. "She's one of the ones that when you're watching [country music awards shows], when it's Miranda's turn to come out and perform, you can almost take a deep breath of relief knowing that, 'OK, this one's going to make us look good. This one's not going to sound [embarrassing] on national television and make the whole country music industry a joke.' Miranda's one of the ones that brings credibility to us, as a writer and a singer, and is unique."

With two thriving careers in the same business, the couple explain that they make their relationship work by staying out of the limelight as much as possible.

"If we were a Hollywood couple, we would have already broken up," Miranda says. "We're so not into the scene. We don't care about that at all. People have started to call us a country power couple, which is so cool and flattering ... but it's not what defines us at all. Where we are the real us is at home -- at his farm or my farm. I'm glad we have moved past the glamour of it all and are just real people, especially together. We're just two country people who really love our jobs and each other and everybody else can take what they want from that."