The 48-year-old singer took to her Instagram Stories over the weekend to document the birthday festivities for boyfriend Blake Shelton, who turned 42 on Monday. During the quaint party with friends and family, Stefani can be heard singing "Happy Birthday, dear Blakey," while Shelton is served up a special dessert.
Stefani and Shelton had an intimate date night with friends and their children at BOA Steakhouse in West Hollywood, CA, on Saturday, ET has exclusively learned. The group arrived around 8 p.m. and left around 10 p.m.
“The two looked more in love than ever,” an eyewitness tells ET. “Everyone was getting along super well, and they all seemed to have great chemistry and a great family connection.”
Shelton noshed on a New York strip steak while Stefani enjoyed part of a branzino and a fresh chop chop salad. The couple also shared creamed spinach and french fries while sipping on dirty Martinis.
“They looked so authentically happy, it made other guests at the restaurant smile,” the eyewitness says. “The held hands and engaged in some light PDA. It was adorable!”
And the celebrations didn't end there. The mother of three -- whose sons, Kingston, 12, Zuma, 9, and Apollo, 4, were on hand for the festivities -- also shared photos and videos from a cookout on Sunday, that was in celebration of both the country crooner's birthday and Father's Day.
Shelton can be seen hugging, grilling and opening presents with Stefani's dad, Dennis. "Cutest humans," the pop star captioned one video of her boyfriend kissing her dad on the cheek.
Stefani again sang to the birthday boy, and he seemed to enjoy the attention as he blew out the candles on a colorful sprinkle cake.
The former Voicecoach also posted a sepia-toned shot of Shelton on his actual birthday, in which his face appears to be placed over a photo of a living room. "Happy b day @blakeshelton #iloveuthemost #yourmyfavorite gx," Stefani captioned the pic.