Adam Levine is adding fuel to the fire as he teases Blake Shelton and Gwen Stefani and their possible budding romance.  

"Blake and Gwen's relationship is definitely water cooler talk on the set of 'The Voice'," a source told Hollywood Life. "Everyone wants to see them happy and it just seems like perfect timing for them to become more than friends. Their two divorces are not really talked about openly -- by anyone other than Adam. He loves to tease Blake and Gwen about a possible romance. He jokes that they are both single now so they should just go ahead and do it. He can't help himself."

The rumors spiked up since Shelton and Stefani was spotted flirting with each other on the set of the Voice.  The two were reported to have started being close with each other following their divorce.  And reports say that Adam knows the real deal between the two.

"Adam and Blake are like brothers so anytime they can give the other one a hard time they go for it. It's all in good fun though as Adam is completely supportive of both Blake and Gwen and the difficult time they have been going through in their personal lives. They are definitely a big loving family," the source added.

Even Luke Wade, who was been part of 'The Voice' Season 9, affirmed the prospective of Shelton-Stefani relationship, as he told Hollywood Life, "I think just having known the two of them I could kinda see that. 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."

Wade even added that Stefani and Shelton are helping each other get through their respective tough times, since they are familiar with each other's marital struggles.  

"They have confided in each other in a way they really can't with others because they both know how it feels being a celeb and going through stuff like this. They are a great support system for each other," Wade reportedly said.