Billy Idol remains crucial to rock ‘n' roll. His style, charm, charisma and bravado transcend trends and time. Idol is respected as the original punk rocker who long ago found a way to take that sneering punk attitude into the pop and rock mainstream, carving out songs that have lasted a lifetime. "I've been fighting with my demons so long, they've become my friends," sings Idol on "Cage," the title track of this new four-song EP.