Blake Shelton kicked off his 40th birthday Saturday, with a sweet message from girlfriend Gwen Stefani.
"Happy birthday to my favorite person I ever met @blakeshelton," the 46-year-old singer wrote on Twitter.
She also punctuated the post with the emojis of a cow, a bee and a sunflower, calling Shelton a "superbabe" in the tweet's hashtag.
Stefani even went as far to change her Twitter avatar to a picture of her 40-year-old beau, adding to the celebration.
"Now THIS is how you start your 40's!!!!!!!!," Shelton wrote, retweeting the photo. "Thank you @gwenstefani for everything..."
The loving message comes two days after Stefani was seen picking up party supplies at West Hollywood, California, novelty shop, Ahhs.
The duo started dating seven months ago, and are said to be "really happy together," an insider told WHO.
They "not putting pressure on themselves" and are "just enjoying life together," the insider said, adding that their friends see a "longterm future" for the couple, who made their relationship red-carpet official over Oscar weekend.
"Everyone is thrilled because they're both incredibly nice people," another source told WHO.
The "Hollaback Girl" singer continued her birthday wishes for her fellow Voice coach, positing another childhood photo of Shelton on her Instagram account.
"Happy birthday to @blakeshelton literally my favorite person," she captioned the shot.
Stefani signed both of her social media messages with her signature "gx" – known to mean "Gwen, with a kiss."
Earlier this month, Stefani set the record straight about all the "gossip-y, weird stories people make up" about her relationship with Shelton, telling 94.7 Fresh FM's "The Tommy Show" that she's taking their relationship "one day at a time."
Both musicians ended long-term relationships last year, with Shelton and Miranda Lambert divorcing in July and Stefani and husband Gavin Rossdale announcing their split several weeks later.
Shelton's birthday wasn't just filled with romantic messages. He also took time to congratulate friend Luke Bryan on his chart-topping song, "Huntin', Fishin' & Lovin' Every Day," tweeting him "Congrats @LukeBryanOnline on your #1 song... Even though you are a complete douche bag and a horrible influence on children.. And dumb."
"And ugly," he joked in another tweet.
"Just remember – I'll always be one month younger than your old ass," Bryan joked back.