Dearest readers, I have a confession to make: I might have a new fast-food fixation because McDonald's has officially stepped into the dirty soda game. Who needs to hunt down their closest Swig location? Certainly not you, since you can now take a five-minute drive to your local McD's to get in on the famous Utah drink that Secret Lives of Mormon Wives fans can't get enough of. I really never thought I'd be a fan of the soda-cream-syrup combo but, well, here we are. And right on the heels of Slice's canned dirty soda release , the timing couldn't be more apt. But that's not all — McDonald's also released three new Starbucks-style refreshers. In other words, they gave us six new buzzy drinks just for existing. Obviously, I had to try them (and rank and grade them — the whole shebang!) to see whether they're really up to snuff. McDonald's New Beverage Lineup Here's a full list of all six bevies, which officially launched on May 6 and will be available permanently (!!!) nationwide. Time to rank these bad boys.…