Gwen Stefani & Blake Shelton's Duet is 'Very Personal'

Gwen Stefani shows off her stunning smile while chatting with a friend outside the Palm on Friday afternoon (April 22) in Beverly Hills, Calif.

Earlier in the week, 46-year-old singer revealed that she and her boyfriend Blake Shelton will have a duet together on his upcoming album.

PHOTOS: Check out the latest pics of Gwen Stefani

After the announcement, Blake opened up about how the couple wrote the song and what it means to him.

“[The song] is very personal for us both because, you know, we obviously have this bond that is remarkable together. The fact that we wrote a song together…I know that I don’t cowrite that much because I’m very insecure about it, I guess, and [Gwen's] kind of got her circle of people that she writes with. But for us to reach out to each other as writers, it may never happen again. Who knows,” he told ET.

30+ pictures inside of Gwen Stefani out to lunch…