British musician Ed Sheeran did an a cappella version of Britney Spears's hit song "Hit Me Baby One More Time" featuring freestyles between him and Z100's Paul the Web Guy (Paul Costabile).
The unlikely rapper surprisingly did a decent job with an incredibly accurate impersonation of an American accent. Sheeran came out with a rap EP called "No. 5 Collaborations Project" in 2011 so the freestyle may not be that surprising to his fans.
Sheeran is set to release his sophomore album sometime early next year.