Blake Shelton & Gwen Stefani Got Cozy At Jared Leto's Halloween Party AND Left Together -- So Are They Dating Or What??

It's getting mighty close to being official, it seems!! Blake Shelton and Gwen Stefani fired up all those dating rumors on Halloween night, enjoying George Clooney's Casamigos Halloween Party together, and then making their way to another celeb event! Related: Blake Is OK With People Joking About His Divorce! From Clooney's — where, a source says, the two