Gwen Stefani admits having 'third party' involved is key in happy marriage to Blake Shelton

The couple has a faithful "third party" join their happy marriage - one that's always watching over them from above.

During an appearance on "The Drew Barrymore Show," Stefani, 55, dished on the best advice she's ever received about love, saying, "Best advice would probably be, make sure you have a third party." The singer referred to God, as she looked up and pointed one finger to the sky. 

Barrymore then asked the pop star if she'd rather have a "date night out or a date night in."

"For sure in," Stefani laughed. "I'm literally like - couch, blanket, cookies, chips."

Stefani continued to paint a cozy picture for the host, as she imagined herself in her home.

"I would sit next to him," she added, "but he's gigantic and we don't fit anywhere."

Despite the fact that the two come from different musical backgrounds, they have released many duets together, including "Nobody But You," "You Make It Feel Like Christmas," "Happy Anywhere" and, most recently, "Purple Irises," which is on Stefani's latest album, "Bouquet."

In 2022, Shelton announced that after the 23rd season of NBC's "The Voice," he was stepping away from his coaching duties to focus on parenting with Stefani. 

Although the country music star doesn't have any biological children of his own, he places a lot of importance on being a stepfather.

"If I walked away from my career at this time, the only thing that I run the risk of is having regrets that I'm missing out on some more important things in life. For now, that's our kids. This isn't about me anymore and never will be again," he said as he pivoted to a less work-based life.