 After the release of Carey 's " Obsessed " , a song about an obsessed man who claims to be having a relationship with her , suspicions were raised by many , including Eminem himself , that it was directed at Eminem , despite claims to the contrary by Cannon . As a response , Eminem released " The Warning " , in which he claims he still has proof of the couple . Cannon responded to the song with his " I 'm a Slick Rick " , and even challenged Eminem to a boxing match for charity which never took place . Though not released as a single or as part of an album , " The Warning " appeared on three Billboard charts . 
