Kirstie Alley, whose ballooning weight has gotten heavy play in the tabloids in recent months, will poke fun at her plus-sized image in a new reality series for Showtime titled Fat Actress. She'll play a "slightly fictionalized version of herself," says Showtime chief Robert Greenblatt, "an actress trying to lose weight, get a man and find a job." So, what exactly is the fictionalized part?