Joanne was beginning to come to terms with the fact that this might all be nonsense. She turns her sights on who started this conspiracy. Where did it come from? Joanne speaks to experts in online rumour spreading. She hears some extraordinary stories about how lies have gotten completely out of hand and become widely believed (to devastating effect.) Perhaps whoever started this had no idea it would go viral. We really should think more carefully about what we write on the internet… Who Replaced Avril Lavigne? Joanne McNally Investigates is a 6-part series produced by What’s The Story Sounds – for BBC Sounds and CBC.