Here are 14 things you need to know about J Cole, including the one about him dressed as a kangaroo.
Hear the 'Power Trip' and 'Acid Rain' rappers hook up.
This week J Cole took the stage at US Festival Spark In The Park, which takes place at the University of Illinois Chicago, and during his headline set surprised fans by bringing Chance The Rapper on stage to perform unheard collaboration 'Thotty'.
Chance perviously premiered the song during a US radio show, but it was unclear that the 'Power Trip' rapper also had a verse on the track.
Watch J Cole and Chance The Rapper perform 'Thotty' live above.
(Warning: This song contains language that some people may find offensive.)