First a younger Betty Crocker and Aunt Jemima and a slimmer Big Boy were created to update those advertising icons. Now a well-endowed, Barbie-faced Sun-Maid girl is representing her raisin company in TV and print ads. (She's still the 1970s version on Sun-Maid raisin boxes.) At 95 years old, her new look suggests she has seen a plastic surgeon. At least she still wears a bonnet--but her old one looked more comfortable.