Katherine and Amy from the singing group, Cimorelli, talk about the band's new book, Believe in You. Cimorelli is a life positive singing group with 5 million plus YouTube followers and a billion views. The teen years may be difficult, confusing, awkward and scary, but it's a lot better when you have someone to go to for advice. Through their music and now a book, the Cimorelli sisters offer some positive, encouraging words.