October 1, 2010 9:20 pm Jimmy Fallon Explains Evolution Of “A History of Rap” Jimmy Fallon talks about his viral hit from “Late Night with Jimmy Fallon” in which he and Justin Timberlake rap to some of the greatest hip-hop songs in history! Whose idea was it? US & World Videos 8:39 Gina Rodriguez gushes 0ver motherhood with son Charlie 2:22 Scarlett Johansson and Colin Jost have date night at White House Correspondents' dinner 1:37 Pro-Palestinian protesters gather outside White House correspondents' dinner 2:05 How ‘Love Is Blind' made Vanessa Lachey and Nick Lachey's marriage stronger 2:30 ‘Baby Reindeer': Inside Richard Gadd's Netflix phenomenon