Billy Star is Kevin's new act (theory) In JUNKY, Kevin says he deleted his tweets (or his entire Twitter lately) because he's ashamed of being a Simpson. Simpson is Kevin's real last name, and he's associated Kevin with himself for a while now ("same last name as OJ" line in STAR and other references to his birth name in other songs confirms that Kevin is just a pseudonym and who he raps as in BH is essentially his real self). I think that Billy Star is an entirely new act or personality that Kevin will use in future solo and BH music, which will be completely separate from Kevin Abstract/Ian Simpson (his personality, homosexuality, etc).