“I never should have written ‘Hip to be Square’ in the third-person,” says Huey Lewis of the News fame. The man who has sold more than 30 million records, spawning such ‘80s classics as “The Heart of Rock and Roll,” “I Want a New Drug,” the Oscar-nominated “The Power of Love” and the song he’s fretting about now, a narrative lynchpin in both the book and film of Brett Easton Ellis/Mary Harron’s “American Psycho.” “People though I was singing about myself.”