Actress Sasha Pieterse who stars as Alison on ABC Family's hit show "Pretty Little Liars" talks with #InTheLab host Arthur Kade at the ABC Family's 25 Days of Christmas Winter Wonderland Event. She chats about how happy she is about the show's longevity and how enthusiastic she is for the new season. #PLL fans can join the conversation on #Tweetchat here http://qub.me/2UZcp0