Blake Shelton celebrated his 44th birthday earlier this week, and his girlfriend Gwen Stefani made sure to share a sweet Instagram post in his honor. The 50-year-old No Doubt singer posted a cute photo of the pair. https:\/\/www.youtube.com\/watch?vB791qVG3Ewk&t182s Read on to find out what Gwen said in the post, and to learn more details about Gwen's triumphant return to The Voice coaching panel later this year. We can't wait to see Shefani back together again! https:\/\/www.instagram.com\/p\/CBmlicODGpx\/?utm_sourceig_embed Gwen Stefani Wishes Blake Shelton A Happy Birthday Gwen posted an Instagram photo in which she plants a kiss on Blake's cheek and he smiles for the camera. In the caption, Gwen wished Blake a happy birthday and wrote, "thank u for being my best friend." She added a couple of cute emojis and the hashtag #luckyme. RELATED: TOP 10 BLAKE SHELTON MOMENTS, ON 'THE VOICE' AND BEYOND According to People, the couple (who has been together since 2015) has been spending quarantine at Blake's Oklahoma ranch along with Gwen's kids Kingston, Zuma, and Apollo. Blake compared it to Little House on the Prairie, telling Jimmy Fallon they've been baking bread and gardening. Gwen wasn't the only one to wish Blake a happy birthday on Thursday. His Nashville bar Ole Red posted a video featuring birthday wishes from various famous faces in the country world, including Blake's former Voice winners Cassadee Pope and Danielle Bradbery. https:\/\/www.instagram.com\/p\/CBl7hwbDGnX\/ Gwen Stefani is Returning For 'The Voice' Season 19 It was recently announced that new coach Nick Jonas will not appear in The Voice Season 19. Instead, Gwen Stefani will return to the show once again, joining her boyfriend Blake. RELATED: WATCH GWEN STEFANI SHAVE JIMMY FALLON'S INITIALS INTO BLAKE SHELTON'S HAIR DURING QUARANTINE HAIRCUT A source told Entertainment Tonight that Gwen is "over the moon" about returning to the show, and is ready to get back to work. "As much as Gwen loves her family life at home, she needs that outlet," they explained. Can we expect an engagement announcement from Gwen and Blake any time soon? The source said not to hold your breath. "People keep asking her about when she and Blake might tie the knot, but she is in no hurry," they said. "Right now, with everything happening in the world, she has definitely put any wedding plans on the back burner."