Kylie Minogue thinks of her U.S. fan base as something akin to a secret society — in the best possible way. Some might turn that phrase to say Minogue is a well-kept secret in the United States. Now that she’s touring behind her album “Aphrodite,” pop fans can understand why the Grammy-Award-winning Minogue has receive countless awards, sold more than 60 million albums and has sold-out world tours.