In July 2007, Us Weekly's cover showed Jennifer Aniston, Cameron Diaz and Jessica Simpson under the headline "Why They Can't Find Love" in the "self-absorbed world of Hollywood." Well, now it's turned out John Mayer has found them all! The 30-year-old singer hooked up with Aniston in Miami last weekend. (Check out the latest issue of Us Weekly, on newsstands now, for every last detail on the...