King Joffrey

Male artist allegedly playing at the 2014 South by Southwest Festival (SXSW), according to the "Lie Witness News: SXSW Edition" sketch on Jimmy Kimmel Live! (3/13/2014).

His album is Watch the Iron Throne.

Must be a big fan of Game of Thrones / Song of Fire and Ice, since he's named after one of the characters.