The couple's new collaboration, "You Make it Feel Like Christmas," -- recorded by Stefani, and featuring heartfelt vocals from Shelton -- paints a picture of Wintertime love and romance, and the angel-voiced pop singer has given a lot of credit to her country crooner boyfriend for help with the lyrics.
However, Shelton tells ET that he doesn't really deserve his ladylove's accolades.
"I sent Gwen a couple of lines of the song. She took it and made the song what it is. I just sent her an idea," Shelton humbly explained to ET's Lauren Zima on the red carpet at this week's taping of The Voice in Los Angeles. "She tries to say that I co-wrote it, but I just sang on it."
A few of the lyrics that stuck out for a lot of fans were the especially sweets lines, "I never thought I'd find a love like this/But I found forever in that very first kiss," and ET had to know if they were written about Stefani and Shelton.
"I would like to think so, come on," the 42-year-old Texoma Shore singer said, smiling. "This is romance around here, of course!"