The happy couple, along with the No Doubt frontwoman's three children, visited the Chickasaw Cultural Center on Monday in Sulphur, Oklahoma -- and Stefani was excited to sport some of the tribe's styles. On her Instagram story, the 47-year-old singer shared video of all the jewelry she picked up at the center.
She also snapped photos with some of the locals, while donning a headband and other Native American clothing. In addition to her outfit, Stefani and Shelton posed with artifacts from the center, which calls itself "one of the largest and most extensive tribal cultural centers in the United States."
While Stefani was rocking a Chickasaw style, her sons, Zuma, 8, and Kingston, 11, looked more like Shelton in camouflage and cowboy boots.
After the family visit to the cultural center, it was time to hit the lake. Stefani shared a photo of the 41-year-old country crooner and one of her sons adorably jumping into the water, with the hashtag "#goodtimes."
It's no secret that Shelton and Stefani are smitten with one another, as this family day proves. "It's incredible to have a best friend like that guy," she told ET last November. "He's an amazing person."