What she means:
Selena Gomez guest starred on Hannah Montana as pop star/rival Mikayla Skeech in three separate episodes. But she also was Alex Russo in Wizards of Waverly Place. We know that Wizards of Waverly Place and Hannah Montana take place in the same world because of the 2009 crossover special "Wizards on Deck with Hannah Montana". Both characters can't exist simultaneously unless Alex Russo created a pop star alter ego and used magic to never be recognized for it, yet this is never addressed and the series move on
i'm the man who had the cheese! i'm the man who had the jerky!
put them both together, and dude, it really worky! ccheese jerky! say what? say what? cheese jerky! say what? say what? mozzarella, moose swiss and mayodan turkey! just one taste and it will drive you bazerky! cheese jerky! say what? say what? and it's all fricky fricky, fresh!
what she means:
in that one episode of sonny with a chance, when sonny created a fake club called "the basement", she told tawni that chad still believed miley and hannah were two different people. this means that both shows existed in the same universe during the same time period. when selena gomez guest-starred in one episode, she played herself, yet she portrayed hannah's archenemy mikayla on hannah montana. lets also recall that hannah and alex russo met on the S.S. TIPTON during the crossover "wizards on deck with hannah montana". so is selena really leading not a double, but a TRIPLE life? and more importantly, what is her real identity? selena, mikayla, or alex?