An adorable sloth stopped by the show on Wednesday, rolling around upside down and showing off her big eyes and trademark smile to help promote filmmaker and zoologist Lucy Cooke's new book, "A Little Book of Sloth."An cute sloth stopped by using the express on Wednesday, rolling around upside down and exhibiting off her big eyes and trademark smile to assist promote filmmaker and zoologist Lucy Cooke’s new ebook, “A Little eBook of Sloth.”