Justin Timberlake and Jimmy Fallon have everything from "Hammer time" to "Summertime" covered in latest "History of Rap"

Justin Timberlake returned to "The Tonight Show with Jimmy Fallon" and, not surprisingly, so too did the "History of Rap" segment, in which he and the host take advantage of the Roots being right there to whip through 30 years of rap history in a little over 6 minutes.

Last night's edition featured reprisals of works by M.C. Hammer, D.J. Jazzy Jeff and the Fresh Prince, Snow, and N.W.A.

Watch the entire bit below via NBC.