It is hot in here?
Or is it Gwen Stefani and Blake Shelton?!?
According to the latest update on these Voice coaches, their relationship has graduated from lukewarm to scalding in just a matter of weeks.
"Gwen and Blake are steaming up," a source tells E! News.
"They have been having some great times with each other the past few months and are on the same page of life now.
"Blake is extremely supportive of Gwen and her kids' transition. Blake is really great with kids and loves being around children. He has a lot of patience."
Shelton and Stefani both ended their marriages this summer, the former to Miranda Lambert after four years and the latter to Gavin Rossdale after nearly 14 years.
It didn't take long for the stars to them get together themselves.
They now "spend a lot flew time together" and are "getting more serious," the insider adds, explaining that they jetted to Nashville over the weekend to celebrate the engagement of singer RaeLynn and Josh Davis.
"They were extremely friendly to everyone at the party and fit in just great," another source says.
"They acted normally and were very down-to-earth, regular people. Both of them together were the life of the party. They didn't show too much PDA, but you can tell they were a couple and very into each other."
The two had previously been spotted getting their kissing and their butt-grabbing on.
Concludes another onlooker, who attended the aforementioned engagement party in Nashville:
"Blake and Gwen were great. They looked happy. They were having a great time and dressed in spirit.
"Blake gave a nice little toast to Raelynn and congratulated his close friend…what a friend would do for another friend."