Katie Couric made her debut as an ABC personality on Tuesday night with a B-list celebrity interview with Sarah Jessica Parker, who is promoting her upcoming film I Don't Know How She Does It . Appearing on ABC's late-night magazine show Nightline, Couric lobbed mostly softball questions and Parker easily hit them into the infield. Parker's big reveal is that she drives a minivan, "and I'm telling you, it's the most wonderful car." She maintained that she was not bothered by paparazzi, except for their "lack of civility," which she regards as a "more intimidating and more painful experience." Ratings for Tuesday's Nightline , which have steadily been ahead of the Tonight show on NBC and Late Night on CBS in the 11 30 p.m. half-hour, were not immediately available.