 Yasiin Bey gave Colbert the use of his stage name Mos Def on October 5, 2011.After Mike Tyson failed to appear in a scheduled interview with Colbert on July 23, 2013, Colbert declared himself Heavy Weight Champion of the World and granted himself use of the title.The large asterisk in the title is to denote that he did not defeat Tyson in a boxing match.