Chris Crocker has been called "queer," ''a human train wreck," the "Britney guy," an androgynous "it" and much, much worse. But how does this 19-year-old Internet phenomenon, known worldwide for his tearful YouTube defense of Britney Spears, define himself? "I'm the key to world peace," says Crocker, sporting a sleeveless black T-shirt with a hot pink silhouette of Marilyn Monroe. His blond bob is swept behind an ear and the eye liner is, as always, flawless. World peace aside, the teenager has captured millions of viewers on MySpace and YouTube with his passionate, campy and sometimes furious monologues about life....