For Fallon’s first performance on the Tonight Show, he brought on a rather packed list of guests. One of which was Will Smith, who joined Jimmy to perform the “Evolution of Hip-Hop Dancing.” With the Roots behind the duo, the two go through a ton of hysterical dance moves like the stanky leg and the wop.
Watch the performance below.

http://youtu.be/Jx2raP3P3FQ