June 27, 2016  

Justin Timberlake and Jimmy Fallon Made Impromptu Rap

October 1, 2010 (4:25 am) GMT
While having Timberlake as a guest, Fallon jumped onto the floor to perform the 'History of Rap', rapping to songs by Digital Underground and Jay-Z among others.

gave late night U.S. TV viewers a treat on Wednesday, September 29 when he joined funnyman for a surprise medley of hip-hop hits. The singer-turned-actor appeared on "" to promote his new movie "", and he heaped praise on Fallon's house band, .

The pair then began reminiscing about hip-hop icons such as The Sugarhill Gang - and suddenly broke out into song, trading lyrics from their classic "Rapper's Delight" before moving on to cover other rap hits, including Digital Underground's "Humpty Hump", and 's "Nuthin' but a 'G' Thang", 's "My Name Is" and 's "Gold Digger", as The Roots played back-up.

The impromptu concert ended with the pair trading lines from 's "Empire State of Mind" as they leaped into the aisles of the studio audience, bringing the crowd to its feet as stunned music fans sang along.