These two have been weaving through over three decades of hip hop music for years now, but last night Jimmy Fallon brought back his "History of Rap" partner Justin Timberlake for the fifth installment in the series — and their first since Fallon took over as The Tonight Show host. It was as good as ever, kicking off with LL Cool J's "I'm Bad" and ending on Run DMC's classic cover of "Walk This Way," working through a little Beastie Boys, Kendrick Lamar, and Drake in the middle (the full song list is on The Tonight Show's YouTube page).

Come for the Salt N' Pepa, stay for JT's C-walk.