Did you know September 13 is Fortune Cookie Day? Neither did we! But in honor of this most sacred national holiday, we've predicted some fortunes of our own for a few of our favorite stars. Will Blake Lively's marriage thrive? Will John Mayer and Katy Perry last? Will Jen Aniston finally get her dream (second) wedding? Click through to see what Wonderwall's crystal ball divines for these celebs and more.