The singer Mariah Carey cracked jokes and earned laughs from a notoriously tough crowd of reporters as she promoted the upcoming series, which she billed as a documentary more than a garden variety reality show. "Mariah's World" will chronicle a busy time in the singer's life, following her as she preps for her first European tour in ten years and her wedding to Australian businessman James Packer. Appearances from ex-husband Nick Cannon might also be possible, but Carey said that remains to be seen, as the series is still being edited.