Gwen Stefani and Blake Shelton have been inundated with messages from fans following the country singer's latest post – and it's too cute.MORE: Gwen Stefani's latest appearance sparks concern from fansOn Thursday to mark Thanksgiving, Blake took to Instagram to share a loved-up selfie of the pair beaming at the camera, and reflected on their year alongside the picture in a cryptic message alluding to the couple's engagement.