Jimmy Fallon and Justin Timberlake Drop 'History of Rap 5'

Jimmy Fallon capped off his first week as host of the Tonight Show with who else — his pal Justin Timberlake. The pair have already schooled us on the history of rap, but last night they debuted the fifth edition of the skit. These two are quickly becoming the best comedy duo of our generation, honestly. We wish every week was Timberweek.