Miranda Lambert is known for her sweet smile and huge heart, especially when it comes to animals. But her husband Blake Shelton warns that the songstress truly is sweet as pie -- until you cross her.

After years of marriage, Shelton knows how to handle Lambert. He says with a smile, "I don't give her too much s***. That's like poking a bear." The laid-back 'Neon Light' singer is the perfect contrast to his wife's fiery personality, and it sounds like they handle it just fine.

"She's as lovable as can be -- until you cross her. She'll go from zero to 100 real quick," he reveals. "If Miranda has an inkling you're saying something harda-- to her, it's gonna be a problem."

Perhaps Shelton learned from experience -- or maybe he just learned from her reaction to others -- but it appears that he simply loves his wife and tries not to stir up too much trouble. In his words, "I'm a lover, not a fighter."

With saucy songs and a fiery personality, Lambert certainly isn't afraid to speak her mind.  But, that's the spitfire side of her that Shelton was drawn to, and probably a big reason he married her.