In case the prospect of dancing live in front of millions of people wasnât nerve-racking enough, now you have confirmation of your greatest hope/fear: Jennifer Lopez will be watching you. In addition to executive producing NBCâs upcoming dance competition World of Dance, J. Lo will also serve as a judge, a role that, until recently, she held on American Idol. Because if any one dancer deserves to judge other dancers, itâs a dancer who danced so sensuously, she levitated through a grid of lasers and danced in the sky, as recorded in the famous documentary short 1999 âWaiting for Tonight.â