0Celebs NOT On FacebookHow does the social media giant decide who and what to put in your feed? Tom Weber conducts a one-month experiment to break the algorithm, discovering 10 of Facebook’s biggest secrets.Updated Jul. 14, 2017 7:55PM EDT / Published Oct. 11, 2010 10:02AM EDT Carlos Alvarez / Getty Images Justin TimberlakeCarlos Alvarez / Getty Images Jesse EisenbergCarlos Alvarez / Getty Images Aaron SorkinEvan Agostini / AP Photo Drew BarrymoreChris Weeks, WireImage / Getty Images George ClooneyVera Anderson / Getty Images Kristen StewartAndrew H. Walker / Getty Images Robert PattinsonJordan Strauss, WireImage / Getty Images Jennifer AnistonChris Pizzello / AP Photo Blake LivelyAndrew H. Walker / Getty Images Seth RogenChris Pizzello / AP Photo Miley CyrusKevin Winter / Getty Images Keira KnightleyPascal Le Segretain / Getty Images
Justin TimberlakeCarlos Alvarez / Getty Images Jesse EisenbergCarlos Alvarez / Getty Images Aaron SorkinEvan Agostini / AP Photo Drew BarrymoreChris Weeks, WireImage / Getty Images George ClooneyVera Anderson / Getty Images Kristen StewartAndrew H. Walker / Getty Images Robert PattinsonJordan Strauss, WireImage / Getty Images Jennifer AnistonChris Pizzello / AP Photo Blake LivelyAndrew H. Walker / Getty Images Seth RogenChris Pizzello / AP Photo Miley CyrusKevin Winter / Getty Images Keira KnightleyPascal Le Segretain / Getty Images