JoJo Siwa to Headline Inaugural U.S. Nickelodeon SlimeFest Sara Alessi March 6, 2018 Top Stories Nick star JoJo Siwa is among those lined up for Nickelodeon SlimeFest, the first multi-day music festival for kids and families in the U.S. The content you are trying to access is only available to members. Log In Register JoJo Siwa Live Nation Entertainment Nickelodeon Nickelodeon SlimeFest 2018-03-06 Sara Alessi Share