Video: Justin Timberlake and Jimmy Fallon's Hip-Hop Medley

Justin Timberlake, Jimmy Fallon, and The Roots took viewers through the history of rap—all the way from Sugarhill Gang to Jay-Z—on Wednesday’s “Late Night with Jimmy Fallon.” Their impressive medley featured past and present hits from Run-D.M.C., Beastie Boys, Snoop Dogg, Dr. Dre, Eminem, Missy Elliott, Soulja Boy, T.I., Kanye, and more. Take a crash course in hip-hop below.