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 21:18 Jim Gaffigan gives hilarious dad advice to Kelly Clarkson audience 9:45 Orlando Bloom says he's shocked he's still alive after filming his new adventure show 9:22 Mississippi nonprofit tackles poverty head-on through radical approach 1:49 Jay Leno and wife Mavis step out on a date night following her dementia diagnosis 5:44 Drake Bell talks overcoming substance abuse and his darkest moments