Jenna Dewan
When Jenna Dewan and Jennifer Lopez were both on the NBC show World of Dance, everything looked to be going swimmingly. Lopez served as a judge and executive producer on the reality dance competition, while Jenna served as a mentor and host. J-Lo and Dewan are both dancers, and they never showed any signs of feuding on-screen. However, OK! Magazine writes that the atmosphere behind the scenes was quite different.