EXCLUSIVE: Gwen Stefani Dishes on How Blake Shelton's Music Helps Her Coach Country Artists on 'The Voice'

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Gwen Stefani may be all pop on the surface, but her boyfriend, country artist Blake Shelton, is slowly changing that.

The "Used to Love You" singer, along with fellow coaches Adam Levine and Alicia Keys, spoke with ET's Sophie Schillaci Monday night on the red carpet before taping The Voice.

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Stefani, who is coaching budding country musician Brennley Brown on this season of the singing competition, said Shelton, 40, has really opened her eyes when it comes to the country music genre.

"I've been opened up to this whole new world of music that I didn't even know about, and it's been super fun this time because I have a country artist," the 47-year-old singer told Schillaci on Facebook Live. "Between this whole couple of years getting to know country music, but then looking for songs for this little girl who's, like, 15… I have so much new music in me, and I love that. That's my favorite part about being here."

The GRAMMY winner added that, if it weren't for Shelton, she probably would have never listened to country music, admitting, "I would never have been open to it. I've learned so much about heart, your heart in music, just by listening to country music."

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Shelton performed Monday night on The Voice, and Stefani stated that she would absolutely be singing along with his performance.

"I'm so excited for Blake. The song tonight is a great song, and he's an amazing singer," she said, adding that the "Came Here to Forget" crooner can be quite "nonchalant" in his performances. "In the greatest way, like, he's at ease no matter where, whether he's just playing around the house…"

"He doesn't care about sounding good, which is great," laughed Levine.

The jokes continued, with Stefani and Levine striking an adorable prom pose on the red carpet, which Schillaci captured on Twitter.

The Maroon 5 singer playfully taunted, "Yeah, Blake, what's up now, b***h? I got your girl on TV!"

For more on Stefani and Shelton, watch the video below. The Voice airs Mondays and Tuesdays at 8 p.m. ET/PT on NBC.