We're all familiar with viral videos — Gangnam Style, Rebecca Black's Friday — But viral audio? That's a much less common phenomenon. 

One great example is public radio reporter Jeff Cohen's Two Little Girls Explain The Worst Haircut Ever. It told the tale of his two daughters, 5-year-old Sadie and 3-year-old Eva, and what happened when one of them gives the other a haircut. Cohen taped an interview with them about their story, which has now been turned into a picture book.

Jeff Cohen joins Alex Cohen to share more of the story behind the book, "Eva and Sadie and the Worst Haircut EVER!” Hear the interview by clicking "Listen Now" in the upper left.