These are the 5 reasons

J.Lo & Co.: Why megastars are canceling their tours

Poor ticket sales: Jennifer Lopez had to cancel her concert tour at short notice.(Bild: Chris Pizzello / AP / picturedesk.com)

Jennifer Lopez has done it. The Black Keys did too. Both acts have canceled their huge tours across the United States at short notice. Fans are shocked and angry, the music industry is in a tizzy. What's behind it all? Krone+ knows the reasons for the disaster.

"I am completely heartbroken and devastated that I have let you down. Please know that I wouldn't do this if I didn't think it was absolutely necessary. I promise I will make it up to you and we will all be together again. I love you all so much. Until next time." With this meagre statement, superstar Jennifer Lopez recently announced the surprising cancellation of her "This Is Me ... Now" tour, which was due to start on June 26 in Orlando.