We spoke with the cast of Pretty Little Liars at the show's 100th episode party at the W Hollywood in LA on Saturday. Sharing insight about everything from "A" to Alison, the actors made it clear that season five is going to be a game changer. According to the costars, viewers will find themselves questioning everything they thought they knew as bonds are tested, a love triangle develops, and Alison incites chaos. That's just the beginning of what we learned. Watch our interviews below to hear about the surprises in store and much more before the June 10 season premiere.