Sally Ann Howes, an English-born grande dame of American and British musical comedy who captivated children as Truly Scrumptious in the 1968 film “Chitty Chitty Bang Bang,” featuring a magic jalopy that floats and flies into fantasy adventures, died on Sunday in a hospital in Florida.She was 91. Born into show business, the daughter of a popular London comedian and his singingactress wife, Howes was cast in her first movie at 12 and had a stage, screen and television career that spanned six decades. She starred in some 140 productions — musicals and plays in New York and London, and Hollywood and TV movies and mini-series. She sang at the White House for Presidents Dwight Eisenhower, John F Kennedy and Lyndon B Johnson; became a Barbie doll; sang operettas; and later in life lectured and made documentaries.