VIDEO : Gwen Stefani & Blake Shelton Cozy Up at Friend's Wedding

Gwen Stefani and Blake Shelton are all about the photo booth hijinks! The Voice  coaches, who have been dating since at least early November, attended the wedding of Shelton's stylist Amanda Craig and  Joel Borski in Nashville last weekend. On Sunday, the bride posted on her Instagram page several pics of guests, including the singers. 46 year old Stefani is smiling while cozied up to Shelton in several photo booth images. Stefani and Shelton have traveled together frequently over the past few weeks. They visited his family and shopped in his home state of Oklahoma and watched an NFL game in Arizona.