In a recent interview, Gwen Stefani dispelled any notions of marital issues with Blake Shelton, dismissing divorce speculations as "just lies."

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Yet, despite her outward confidence, the singer acknowledged occasional bouts of insecurity. In a candid revelation, she shared that these moments of doubt inspired her to pen the heartfelt duet with Shelton titled "Purple Irises."

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"I had been going through those times where you're questioning: 'Oh my gosh, am I just getting older? Am I cute?' " Stefani said to NYLON in an interview published on Tuesday. "In my own relationship, even though I know the truth of what's happening today, you still create drama in your own mind about your insecurities and what might happen. I was in that phase of the relationship with Blake and getting paranoid."

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Nonetheless, her affection for her husband, 47, remains unwavering.

"The truth is I am in love with my best friend," the 54-year-old continued. "And all this s**t I'm thinking of in my brain, that's all it is. I'm overthinking."

Despite the whirlwind of rumors surrounding Stefani and Shelton's relationship, she hinted that they make a conscious effort not to dwell on them too much.

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"But when you're in love and have truly aligned values, nobody can get to us. You can say whatever you want to say about our relationship. I mean, a week ago we were getting divorced again or something," the songstress added about the recent rumors. "It's just lies. The truth is the truth, and we know what that is."