Gwen Stefani shared photos on Instagram of her helping her boyfriend, Blake Shelton, celebrate his 41st birthday on Sunday.

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"The Voice" coaches have been dating for about two years.

"I get to kiss on the birthday boy @blakeshelton #happybirthdaycowboy," Stefani captioned a closeup selfie of her kissing Shelton under the visor of his baseball cap.

Stefani also posted the message, "Celebrating the birth of my #bestie #favorite @blakeshelton," along with a short video of Shelton with a gift balanced on his head and tied to balloons.

"Birthday armadillo @blakeshelton gx #bdayboy #cake," read the message that went with an image of Shelton's birthday treat -- an armadillo-shaped cake.