Justin Timberlake and Jimmy Fallon performed the 'History Of Rap 5' on the Tonight Show.
The pair sang mashups of hits from LL Cool J, Tone Loc, the Beastie Boys and other top rappers, Radar Online reported.
Their ongoing 'History of Rap' series has been a monster hit and Fallon decided to close out his first week of being a host on 'The Tonight Show' with their performance.