We don't get to choose when or where we fall in love with a performer; sometimes it happens when they're doing Ingmar Bergman, and sometimes it's "Rowan & Martin's Laugh-In." Lily Tomlin joined the cast of that cherished relic of a sketch comedy TV show in 1970, and very quickly millions became her comedy slaves, thanks to Ernestine, her purse-lipped telephone operator, and to Edith Ann, the fidgety wonder of a girl in the oversized rocking chair.