CNN  —  When it comes to entertainment news, it doesn’t get much bigger than this – at least if you’re a preschooler . Oink. Peppa Pig, loved by under-5s the world over, is about to become a big sister again. She and her little brother, George, will soon have a baby sibling to play with, their mother announced on British national TV. The big reveal came in an exclusive, if somewhat unusual, interview Thursday on ITV’s daytime show “ Good Morning Britain ,” in which host Richard Arnold