Miranda Lambert and her husband, Blake Shelton, have weathered breakup rumors since before they tied the knot in 2011. But while the couple insist they are stronger than ever, Lambert admits it can sometimes be difficult to ignore the gossip.

"It's not easy when everyone is trying to tear you down, but you make a commitment and you stick to it," she tells People magazine. "In other parts of the entertainment world, it sometimes seems like marriage is so disposable."

The 30-year-old says they look to some of their own musical heroes for inspiration in their relationship.

"Country has some enduring marriages – Johnny [Cash] and June [Carter Cash], George [Jones] and Nancy, Faith [Hill] and Tim [McGraw]. I'm thankful we have those role models. I feel like our peers are rooting for us. They're holding us up."

Lambert, who only a few months ago denied the tabloids claim that she and Shelton were in the middle of a $40 million divorce, says the rumors started swirling again with the release of her latest single, 'Automatic,' from her upcoming album, 'Platinum.'

"There were rumors that it was about our marriage, that it had become boring and predictable," she reveals."How do people even think that up?"

One thing is certain, though -- the songstress can handle the pressure much better than when she was just starting out, storming up the charts with songs like 'Kerosene' and 'Gunpowder and Lead' almost 10 years ago. Lambert says she is a softer, more gentle version of who she was when her career was just taking off.

"That attitude brought me here and got me where I am," the 30-year-old acknowledges. "But that was me in my 20s. The chip on my shoulder is gone."

'Platinum' will be released on June 3. Order a copy here.