“The Voice” is a reality show, and the coaches are keeping it real. Gwen Stefani and Blake Shelton have been quite friendly on-screen since both singers announced their divorces. Some question if their interactions are scripted, but sources state that they improvise everything they say.

“They’re a real thing,” an insider close to Shelton told Us Weekly. All of their flirting, including that time Stefani called Shelton handsome, is all very real. While that source says they’re dating, another insider told the website that the country singer just thinks of the No Doubt front woman as a friend.

Shelton, 39, announced his divorce from Miranda Lambert in July. The two quickly finalized their divorce, but Stefani, 46, is still in the midst of legal paperwork. She announced her split from Gavin Rossdale in August, but they reportedly have no prenuptial agreement so the divorce might take a while.

Dating rumors have been flying since Shelton and Stefani returned to work on the NBC singing competition, and their on-screen flirting keeps viewers speculating about their relationship. Most recently, Shelton recorded a birthday message for Stefani. While fellow coaches Adam Levine and Pharrell Williams kept their messages short and sweet, Shelton took the time to make the message personal.

“Hey Gwen, happy birthday,” Shelton said. “I would have never, ever, ever have dreamed in my life that you and I would end up becoming friends.”

While their friendship might surprise Shelton, it doesn’t shock one a former contestant. Luke Wade, who competed in “The Voice” Season 7, revealed that he didn’t find the romance rumors surprising. “I think just having known the two of them I could kinda see that,” Wade told Hollywood Life last month. “She is so sweet and Blake is the eternal charmer, so I could easily see how it could happen when you are working together doing something that you both love.”

Viewers won't get to see Stefani and Shelton flirting for much longer though. Christina Aguilera will take Stefani's place in “The Voice” Season 10, Deadline reports. 

Whether Shelton is actually dating Stefani is still to be determined, but at least the “Sangria” singer confirmed that he is happy with his life right now. “I'm in a good place,” he told CMT’s “Hot 20 Countdown” (via People). “I wasn't, but I am now. It's amazing how quickly life can turn around for you. I've had some pretty cool things in recent times that have happened, and I'm loving it.”

“The Voice” airs Mondays and Tuesdays at 8 p.m. EDT on NBC.