Fantasia Barrino chats with ET's Rachel Smith at the TIME 100 Gala in New York City. The singer reacts to Katy Perry leaving 'American Idol,' and says she 'would love' to replace her as a judge. Fantasia also reflects on the deaths of ‘Idol’ contestants Mandisa and Leah LaBelle. Plus, she shares how her 'The Color Purple' co-stars, Taraji P. Henson and Colman Domingo, supported her on set.