Life & Style magazine reports that the flirtatious behaviour between the two on set has everyone’s tongues wagging.
“They’re trying to keep it on the down-low, but it’s not happening partly because they’re all over each other,” a source told the magazine,” she said. “The chemistry between them is off the charts. Everyone on set sees that Blake and Gwen are falling for one another.”
Both marriages ended after reports that both Lambert and Rossdale were cheating on their spouses.
Stefani has been filling in for Christina Aguilera on The Voice in the US.