Blake Shelton turned 41 years old on June 18. So, Gwen Stefani made sure to shower her beau with plenty of love and affection.

The “Hollaback Girl” singer, 47, posted a series of photos on Instagram in honor of her country cowboy’s special day, which included a very unusual, custom-made cake.

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One shot, which you can see below, shows the pair of nearly two years stealing celebration kisses for the camera. For the occasion, Stefani sported a braided forehead headband and freshly applied makeup, while Shelton donned his signature ball cap.

Gwen wrote, “I get to kiss on the birthday boy @blakeshelton #happybirthdaycowboy gx.”

In another shot, fans get a glimpse of Shelton's armadillo-shaped birthday cake. The tall drink of water posed next to the cake creation that was adorned with metallic gold scales. Stefani captioned, "Birthday armadillo @blakeshelton gx #bdayboy #cake."

The country crooner also received a circular cake with white frosting and birthday candles.

Related: Gwen Stefani shocked an audience with none other than Blake Shelton

Shelton seemed to enjoy his birthday festivities and didn't hesitate to showcase his silly side. He chatted with family and friends while balancing a perfectly wrapped present on his head.

Stefani filmed the goofy moment and shared it with fans online. She wrote, “Celebrating the birth of my #bestie #favorite @blakeshelton.”

Following the fun-filled afternoon, Shelton took to Twitter with words of gratitude for his girlfriend and fans. He wrote, "Thanks for all the happy birthday wishes!!! 41 ... (expletive) man I'm beating the odds."

Related: Sounds like Blake Shelton is schooling Gwen Stefani on country music

Of course, Shelton’s birthday wasn’t the only big celebration. June 18 also marked Father’s Day, and Stefani’s dad, Dennis Stefani, was on hand to celebrate with his rock star daughter and the birthday boy.

Shelton spread the love and wrapped his arms around Stefani’s dad and even planted a kiss on his cheek.