VIDEO : Is Gwen Stefani Wearing Blake Shelton's Hat in New Photo?

Are Gwen Stefani and Blake Shelton taking their romance to the next level? Are they...sharing clothes? The two The Voice coaches and singers have been dating officially for at least a month and on Wednesday, Stefani posted on her Instagram page a selfie wearing a camouflage-print baseball cap that's almost identical to a hat Shelton has often sported. The hat bears a logo with two shotguns and a silhouette of a moose that reads "10 Pistols Ranch." While Stefani and Shelton have been photographed looking cozy several times, they have remained coy when asked about their love lives.