Simon Cowell and LA Reid are back at the judges’ table on The X Factor, and we know they will be keeping it super real. What we don't know yet, and what all of America is waiting to see, is the impact that new judges Britney Spears and Demi Lovato will have on the proceedings. These two chart-dominating superstars are certain to keep Simon and LA on their toes, but it will be interesting to see how these extremely successful women approach the judging process—evaluating young singers in the most pressure-filled moments of their lives. The only way to find out if the new quartet of judges has chemistry, and to get a look at the new crop of contestants, is to tune in for the two-part premiere of The X Factor on FOX, which starts on September 12 at 8 p.m., and then picks back up the following night, September 13, again at 8 p.m.