Being cheeky hasn't hurt Sisqo's career. Propelled by his ode to the female posterior, "Thong Song," his debut album has sold more than 2 million copies. MTV declared the tune--in which telling a woman she "got dumps like a truck" is high praise--its official spring-break anthem. The single is so hot that last week Sisqo announced he would tour with 'N Sync this summer. But the next day, he seemed ready to pull out. "I'm the best," he said. "I don't need to open for anybody." That was news to his people, who evidently called their blond bombshell to settle him down. By the end of the day, Sisqo was back with the boys. Guess all that platinum may have gone to his head.