Justin Timberlake Presents 'History of Rap 3'

They're at it again! Justin Timberlake and Jimmy Fallon covered familiar territory on Friday night's Late Night with Jimmy Fallon, performing their third version of History of Rap.

From Sir Mix-A-Lot's Baby Got Back to Young MC's Bust a Move, late night's rapping duo once again brought the audience to their feet with their amazing tribute to the pioneers of hip hop.

Late Night airs weeknights on NBC. Watch the clip for more.