Sounds like Nick Cannon's taking diva lessons from wife Mariah Carey, whose on-tour demands are legendary! When the "America's Got Talent" host stepped into the backstage bathroom at a Florida stadium charity event, he immediately bitched that the bar soap didn't cut it because "it's not the moisturizing kind." Nick's peeps instantly dispatched a gofer, who scoured local shops and returned 30 minutes later with the proper rub-a-dub for Nick's scrub. My SpyWitness, who later shook hands with Mr. Carey...er, Cannon, reports that his paw felt "silky smooth and dainty." (Print Edition - 9/20)