There’s a new kid on the block, and at this point his career prospects look pretty darn promising. Along with his natural, rock-star charisma, he’s been tutored by high-level management and sponsorship — and combined with the necessary vital “street cred,” his ideological activism, conviction, and dedication to social causes has gotten the full attention of the trend-making twenty-somethings, and of the idol makers of marketing: In the last couple of weeks he’s been charting mainly as #2, with a bullet, but his fame is really blowing up — last week he rolled right over #1, to grab the top...